Hellur there! I'm doing a cross over! c: obviously. Anyways here's the story & I hope you enjoy. WARNING: There might be some curse words here and there.

Chapter One:

The London Institute

"Damnit, They're late" Maryse says pacing around the blank white room where Clary and the rest of the gang are supposed to go through a portal and into the London institute. "Calm down Maryse, They're probably still packing, Especially Isabelle, You know how she is" Robert places a hand on his wife as she passes by him, causing her to stop in front of her husband. Maryse was going to speak but Clary, Alec, Magnus, Jace, Simon, and Isabelle ran into the room with their suit cases. Jace leaned on the wall "Did we miss anything?" Simon stares at Jace "What in hell would we miss Jace? We aren't expecting for our ancestors to come through the portal, they're expecting us to do that" Jace stares at his girlfriend's vampire friend. "I know that you incompetent fool, I meant any action between Maryse and Robert, for all you know they could have been-" Clary slaps Jace's arm before he could finish his sentence.

"Hey, Hey calm down there. Don't bruise the merchandise" Clary rolls her eyes "Maybe the merchandise will get dumped if he doesn't stop" Jace stares at Clary "How would you know what merchandise I was talking about? And how do you know the gender? For all you know I could have been talking to the couch and it could be a female.." Clary groans. Jace laughs, He loves it when he annoys Clary with small little things, He thinks she looks cute. Jace looks at Simon, He didn't know why Magnus listened to Clary, Clary wanted Simon to come a long with them to the London institute, but couldn't since he was a vampire, but Clary convinced Magnus to cast a spell on Simon to enter both the New York and London institute.

Maryse sighs. "Magnus, the portal please?" Magnus nods, He lets go of his glittery red suit case and gently places it on the floor. Magnus faced the blank wall and soon enough a portal was open. Isabelle wanted to just jump through the portal and be free of her parents and their rules, but Maryse and Robert quickly stopped her. The sound of the swishing portal filled the room, Wind was blowing through Clary's hair. She couldn't believe she was finally going to the London institute, to see how the old times were. Clary was lucky to even go to London, It took a very long time to convince her mom to let her come, Especially since her boyfriend was coming and who knows what thoughts about Clary and Jace ran through her mind, But thanks to Luke her mother finally gave in. And now here she is, ready to go to London.

"Now I know you all are very excited to go to London, And I know you all are thinking you're free of adult supervision-" Maryse's eyes landed on Isabelle, who gave her mother a crooked smile. "-But Charlotte and Henry Branwell run the London institute and they will be keeping an eye on all of you, They will also make sure the boys and girls sleep in different sides of the institute" Maryse's eyes landed on Jace and Clary this time. Maryse knew Clary and Jace would go to each others room in the night, but of course she said nothing, not wanting to embarrass them. Jace looked at Maryse with a bored expression, not really caring if Maryse directed those words to Clary and him, while Clary was as red as a cherry.

"Can we please go now?" whined Isabelle, she ached to see the old times. Maryse sighed. She walked to Alec and Isabelle. She pulled them into a hug, She grabbed Jace, Clary, Magnus, and Simon into the hug "You all be careful please, Have fun" The London and New York institute were about to meet, and trust me it wasn't going to be pretty, especially since they were going to be together for a whole year and possibly more to learn more combat skills, and things from their ancestors and to see how the old life was before.

Magnus grabbed his suit case, Alec gripped his suit case tightly. Magnus and Alec held each other's free hands and went through the portal together.

London Institute

"What?! Some stupid freaks are coming to our institute? We don't even know them for fucksake Charlotte!" shouts Will, obviously aggravated some total complete strangers were coming to the institute. "Will, Please just calm down. It's nothing big, some shadow hunters are coming here to learn from us, to become better shadow hunters. Nothing is wrong with that" Jem stared at his angered and frustrated parabatai. Will pushed back his black hair "I don't care!" Charlotte was sitting down by her desk, she looked up at Will "First of all young man, You will not speak to me in such tone, Second for all you know you might find these shadow hunters good company, You are always complaining about how every shadow hunter that comes here is rude and annoying" "Don't forget how they supposedly sexually abuse him" Will leaned on a wall, he smirked at the thought.

Will always said little white lies about every shadow hunter that came here so Charlotte could kick them out, and so it could only be Tessa, Jem, Henry, Nate, Charlotte, Jessie, and himself in the institute. "Hey, Don't blame me, I felt someone touching me in the night while I was sleeping" Will muttered. "Probably you were wanking off" Jessamine droned as she walked into the room, She lifted up her dress so it wouldn't get dirty. "What I do or don't do, Jessamine is none of your concern" spats Will. "Okay, What about that time Belle came here, you said she was a pedophile" Jem stated. Will looked puzzled "Who's Belle?" Will asked, Will was never good at remembering names, especially girls he had one night stands with. "The stupid girl you shacked you idiot" Jessamine growled, Jessamine secretly liked Will and she wanted him and she always got mad when she found out Will slept with other girls and not her. Will snapped his fingers as he remembered who Jem was talking about "That girl?, Nope she was a pedophile, She raped me. I did not agree to having sex with her!" "You're such a liar" Tessa said as she came into the room, Will looked at Tessa as she walked in the room. He still loved Tessa, he did his best to forget her and wave away the feelings he had for her, but it was impossible, especially since she lived in the same roof as he did. Will wanted to be with Tessa, to show her that he did love her, that he always will. But it was to late, She was with Jem and he could do nothing about it but mourn for her. "Now why would you say that? I thought we were friends!" Will shouted to Tessa running his hands through his black hair.

Charlotte stood up "William Herondale, Stop it. I do not care if you want these shadow hunters to come or not. I said they could and what I say is final!" Charlotte shouted. Just as she did, a blue swirling portal opened up behind her, Charlotte abandoned her desk and stood next to Jem. Soon enough Alec came through the portal, his suit case went flying and almost hit Jessamine but she easily dodged it as she moved aside a bit. Nate came inside the room and stared at the portal, he stood next to Tessa and gave her a questioning look, Tessa knowing what it meant said "Shadow hunters from the future are coming to live with us for a year or so" As soon as Will heard that he went off "BY THE ANGEL, A whole goddamn year?! Are you kidding me? For all you know these so called shadow hunters could be child molesters, rapists, pedophiles, and sex crazed maniacs" Alec was still on the floor "I don't think I'm any of those" Alec mumbled. Tessa was taken back at how he resembled so much to Will.

As Alec was about to stand up Magnus landed on Alec, But Magnus was sitting on his suitcase, so Alec was completely squished. "Magnus!" shouted Jem as he got up to greet his old friend. "Jem! Hello!" Magnus looked under him and saw his squashed boyfriend who was getting red due to Magnus' incredibly heavy weight "Oh I'm sorry sweetie" Magnus jumped off Alec and grabbed his suit case. Alec quickly got up before anyone could land on him. Simon came through the portal, he had a book bag instead of a suit case so it didn't go flying anywhere. "A vampire! Do you see this!? They brought a long a vampire! They are planning an attack on us! Jem cover yourself man!" Will shouted stepping in front of his parabatai. Charlotte sighed "I'm so sorry about him" Charlotte said to Simon. Magnus told Charlotte about Simon so she didn't freak out or anything. Simon just nodded instead of saying anything because, as always, he was shy.

Simon stepped aside from the portal and soon enough Isabelle came through and both of her suit cases hit Nate. "Oof!" exclaimed Nate as he fell on the floor. He laid there on the floor with the suit cases on top of him. Tessa giggled as she saw her brother. She helped him up and took the suitcases off and placed them nicely next to the portal. Isabelle stood up "Hey where are my suitcases?" Simon laughed "Right there Isabelle" Simon pointed to the suitcases near the portal, Isabelle chuckled and got them. Isabelle, Alec, and Simon stood together. Magnus was hugging and greeting his old friends. Will sighed. He looked at Isabelle, he found her attractive just not the type of girl he likes. Jace came through the portal, he suitcase hit Will square in the face. Will exclaimed in pain, he touched his forehead which was where the suitcase mostly hurt him. Jace stood up, Jessamine was staring around all bored like, but when she saw Jace, she immediately went all "googley eyes" for him, but Jace hardly paid attention to her. Jace looked around for his suitcase "Where's my suitcase?" Simon pointed to the suitcase which was next to Will, who was staring at Jace angrily. Jace cooly and gracefully walked to get his suitcase.

He bent over and grabbed his suitcase. Jace stood straight up, as he did, he met his ancestor face to face. "Watch where you throw that thing" barks Will, Everyone stared at Jace expecting him to be afraid and walk away like mostly everyone does, but they didn't know Jace had bite. Jace had a bored expression as he spoke "Sorry, I don't control my suitcase, It's like it has a mind of it's own" Will was furious, he wasn't used to people speaking back to him. Will had a scowl on his face. Jace just smirked and walked away with suitcase in his hand. He stood next to the portal, he placed his suitcase down, and held his hands out as if waiting for someone or something to fall out. Soon Clary flew through and landed in Jace's arms, Her bag hit Will in the face. Will was ready to burst at whoever's suitcase that was but as soon as he saw Clary he was mesmerized and quickly forgot about the suitcase.

Charlotte asked Magnus to close the portal and so he did. "Well Shadow hunters, Welcome to the London institute-" Henry walked in and stared at the shadow hunters. "Who are these young blokes?" he asked, Charlotte smiled at her husband. Before she could explain Will walked towards Henry. "Well, I'll tell you. The pale one is a vampire, Probably the rapist of the group" Henry raised an eyebrow and so did Simon "The girl with black hair is probably the sexual abuser" Isabelle uncoiled her whip "Who are you calling a sexual abuser? I'll make you swallow your words" growls Isabelle. Will looked at Isabelle with the same bored expression Jace had, he showed no fear. Jem shook his head, Will doesn't know what he's getting himself into thought Jem.

"The fake blonde is probably the pedophile" Henry stared at Will awkwardly. Jace had a snarl "Excuse me? I look nothing like a pedophile. I'm incredibly sexy & yet again look NOTHING like a pedophile" Jace stated. Will rolled his eyes "And the kid with the black hair is probably a sex crazed maniac" Alec stared at Will, Alec quickly figured out Will was alot like Jace so he knew how to handle Will "I don't think I'm a sex crazed maniac, If I was I'd probably drag one of these girls to a bed room" Alec murmured. Will chuckled "Please you'd fuck your own sister for a slice of cheese" Alec stared at Will as if he were stupid "I don't even like cheese" "That makes it even worse, you sick bastard!" shouted Will as he smiled. Tessa bit back a laugh, for some reason she found Will funny at this moment. Henry stared at Will and sighed "What about the small red head? You haven't said anything about her" asked Henry expecting Will to say something horrid about her "Well she seems very normal & very beautiful" Will stared at Clary and gave her a sexy flirty smile, Clary blushed and hid behind Jace. Jace stared at Will "Listen up you perverted moron, She's mine and mine only. I don't like sharing" Will smirked "We'll see about that" and with that Will walked away with his hands in his pocket to his room.

Charlotte walked to the gang and smiled "I am very sorry about Will, Don't take it personal, He's like that with strangers" Simon chuckled "Don't worry, We have our own Will in our institute" every laughed a bit, Jace didn't laugh because he didn't get it. Charlotte smiled "Well, Then I welcome you to our century, I'm Charlotte Branwell, I run the institute and he's my husband, Henry Branwell" Charlotte pointed to her husband who was rummaging through some papers on Charlotte's desk. Charlotte cleared her throat and Henry looked up "Oh, oh, oh! hello I'm Henry Branwell" and with that he went back to looking through papers and made a satisfied sound as he held up a paper with fancy writing and left. "That's Tessa" Charlotte pointed to Tessa who was smiling and walking towards the gang. "Hello, I'm Theresa Gray, But please call me Tessa" Tessa curtsied and stood next to Charlotte. Everyone smiled. "That's Jem" Jem stood up and walked to the gang "James Carstairs, But call me Jem, All my friends do" Jem smiled. Jem stood next to his girlfriend "And that's Jessamine" Jessamine walked towards them, Her eyes were on Jace, Jace stared at her for a brief moment and then looked away. Jessamine got a bit angry "Jessamine Lovelace, If you'd like you can call me Jessie" every nodded and smiled. "And that's Nathaniel Gray, But call him Nate, He's Tessa's brother" Nate walked towards them and greeted them. "William Herondale, Is the boy who walked away just now, But call him Will" Jem said. Jace tensed as he heard his last name, So he's my ancestor Jace thought. Jace didn't know he had an ancestor here.

Clary didn't like Jessamine, She knew something was bound to happen between them both, and she didn't like her because she saw the way she stared at Jace. "Well I guess we should start introducing ourselves" Isabelle started "I'm Isabelle Lightwood" Charlotte smiled and nodded. "Alec Lightwood, Her brother" Alec said. Everyone smiled. "Jace Herondale, Step brother of Isabelle and Alec, Also Alec's very handsome parabatai" Clary smiled at her boyfriend's comment. "Clarissa Fray but call me Clary please, and also Jace's girlfriend" Clary looked at Jessamine when she said the last part. Jessamine didn't seem to care about Clary being Jace's girlfriend. "Simon Lewis, Vampire, and best friend of Clary herself" (A/N: Simon and Isabelle aren't going out in my story... at least not yet) Clary looked at Jessamine, Jesssamine caught Clary's stare and rolled her eyes at her, Clary just looked away before she would lose her temper and do something she'd regret.

"Well you all already know me" Magnus said snapping his fingers, As he snapped his fingers hawaiian punch, chips, soda, cookies, coffee, all sorts of candy, and food appeared on a table that appeared with Magnus's power. The table was in the middle of the library and had twelve chairs. "Dinner is served everyone" Charlotte smiled "How thoughtful, But I think everyone should settle down first" Magnus had a frown on his face "Fine" Magnus snapped his fingers and the table, the chairs, and the food disappeared.

"Tessa please show the girls to their room" Charlotte said. "My pleasure" Tessa smiled. "Clary, Isabelle please follow me" Clary grabbed her things, she was about to walk away but Jace grabbed her arm and pulled her to him "I don't get a good-bye kiss?" Clary smiled as she looked up at her golden angel "Jace I'll be back in a few minutes" Jace smirked "A few minutes is to long if you ask me" Will walked and leaned on the wall "How touching" Jace and Clary looked at Will "It warms my heart. Charlotte I don't have to share a room with the dyed blonde right?" Charlotte looked at Will "Sorry" Will groaned. "I'll have you know William, My hair is not dyed blonde, It's natural" Will laughed. "So am I to late to know all you're names?" Will didn't care about anyone else's name just Clary's. "Surely they'd introduce themselves again with pleasure" Charlotte turned to the gang and smiled. "Isabelle Lightwood and that's Alec Lightwood my brother" Will had a smug smile "More Lightworms eh?" "Watch it" Barked Isabelle. Will ignored Isabelle and stared at Clary "I'm Simon Lewis, That's Clary Fray my best friend" Jace held Clary tightly as he noticed the way Will stared at her. "Jace Herondale" Jace said. Will looked a bit shocked but recovered himself. "Well us Herondale's do have stunningly good looks" Jace smirked at Will's comment "Finally someone gets me" "But I have the better looks" Jace's smirk dropped. He rolled his eyes. "I'm way better looking than you" hisses Jace. "Okay "Mr. I'm way better than you". Describe yourself in three words" Jace smiled "Easy" Jace's eye lit up "Better than sex" everyone rolled their eyes.

"So Clary is it?" Will directed his gaze to the small red head who was still in Jace's arms. Clary nodded slowly "Clary, Clary, Clary, Clary, Clary, Clary, Clary" Will said as if tasting her name. Will thought Clary was beautiful, He noticed she didn't seem to flaunt it like Isabelle did, He also noticed that she didn't even realize how beautiful she was. "Beautiful name for a beautiful girl" Clary blushed, Jace rolled his eyes "Back off Will" Will just smirked. Tessa cleared her throat purposely "Clary, Isabelle shall I show you to your rooms?" Jace smiled at Clary and kissed her. Will rolled his eyes and stood by the library exit. Clary nodded and followed Tessa with Isabelle behind her. Clary passed by Will, Will gave her a genuine smile and Clary gave one back.

Tessa walked down the hall ways of the institute "Well Charlotte told me I'd have to share a room with you two, but don't worry it's a large room and there's 3 beds. One for each of us" Clary nodded and smiled. Tessa opened the door of the three girl's room. Clary looked around the blue room, it had 3 beds with light blue covers. One of them already had a few dresses thrown on it, Clary guessing it was Tessa's chose the one closest to the wall. Isabelle looked around "Tessa" Tessa looked at Isabelle "Yes?" "Do you mind if I change the color of the room" Tessa smiled "I don't mind, If you have a chance to, there's a room all the way down the hall with all of the paint buckets and tools in there" Isabelle smiled and clapped. "I like you already!" Isabelle hugged Tessa tightly. Tessa laughed and hugged her back.

Tessa felt happy that she finally had some girl friends, Girls to talk about her problems, or boys. Clary smiled "Well good luck, Isabelle is very girly" Clary stated. Isabelle looked at Clary "Am not!" "As your best friend, I say you are" Isabelle 'HMPED' at Clary and walked to her bed. Clary laughed. Tessa stared at Isabelle's clothes as she opened the suitcase "Is that the fashion in your century?" asked Tessa curiously. Isabelle looked up from her clothes, She nodded. Tessa was surprised on how fast the fashion changed, and how different and creative it is. Much more interesting then these bland clothes thought Tessa. "Do you want any dresses? Just in case you don't want to stick out" Clary and Isabelle shook her head "Thank you though" Tessa smiled and sat on her bed, she grabbed a book and started reading it while Clary and Isabelle unpacked.

"Charlotte! I am not sharing my room with that dyed blonde!" shouted Will. Jace sighed. "Will, I think it would be nice to share a room with Jace, He can tell us about many things from their century" Jem said trying to show Will the bright side of things. Will groaned "I do not care, I don't want to share my room with him, Well our room" Will growled. Charlotte sighed "Will, I'm sorry. You're sharing a room with Jace and Jem. There is already 3 beds in that room, for each of you" Alec looked at Charlotte "Excuse me, Charlotte?" Charlotte turned around to face Alec "Yes dear?" "Where will Magnus, Simon, and I sleep?" Charlotte smiled "Not a problem there's a room for you three also" Simon's eyes widened. He didn't want to share a room with Magnus and Alec, He had no problem with either of them, Alec and Magnus grew on him and he was close with them along with Jace, even though Jace was a total ass, But Magnus would try to give him a make over and he wasn't up for that PLUS Alec and Magnus would also make out in front of people, and Simon didn't want to see that anytime soon, in fact EVER in his immortal life.

"Any chance I can sleep somewhere else?" Simon asked, but sounded as if he was pleading. Charlotte looked at Simon "For what reason dear?" "Personal ones ma'am" Charlotte thought about it for a second "Well you could switch with Jace" Will stared at Simon "No offense blood sucker, but I'm not sharing a room with you" Simon rolled his eyes, Great another annoying Herondale on my case thought Simon. "Will, you either share a room with Jace or switch with Simon" Will massaged his temples "I can't believe I'm about to say this" Will looked at Jace "I'll have the dyed blonde" Jace had a scowl on his face. "Than I'm sorry dearie" Charlotte looked at Simon who was basically scared to death.

"Well let's go then" Jem said to Jace. Jace followed Jem and Will. Jace was behind Jem and Will, so Will stared at Jem as they walked "I say we wait for him to sleep, put him in a sack, and take him back to his century, and I keep Clary for myself" Jem rolled his eyes "William Herondale, Stop it. First off I see nothing wrong with Jace, He seems like a nice person, Second I will not do that to him, and Third Clary loves Jace not you, and only a fool wouldn't see that" Will sighed. "You know, I can hear you Will. I think I'll get to you before you get to me" Jace said from behind Jem and Will. Will rolled his eyes. Jem opened the door of their room and inside revealed 3 beds with black bed sheets. Two of them had things on them so Jace got the neat and nicely made bed. Jace opened his suitcase and pulled out his clothes and started putting it in a drawer next to his bed. Jem and Will looked at Jace's clothes "Is that you're fashion in your century" Jace looked at them both and nodded. Jace was currently holding some black skinny jeans "Those are very tight pants" Will said. Jace rolled his eyes.

Dinner Time

Magnus snapped his fingers once everyone gathered at the library and the tables, chairs, and food appeared. Henry didn't show up because he was to busy working on a new device.

Everyone sat down and started eating. Will grabbed a cup filled with Hawaiian punch "Is this blood?" he asks staring into the cup. Clary laughed, Will smiled, he thought she looked cute when she laughed. Jace rolled his eyes. Simon sat there staring at everyone while they ate, he was starving and needed blood badly but apparently there wasn't any. Clary noticed that and smiled. Simon looked at her and smiled back "Magnus, can you snap Simon some animal blood?" Clary asked. Magnus winked at her, he snapped his fingers and soon enough there was a bottle of blood in front of Simon, Simon saw it, snatched it, and immediately started chugging it down. Simon made a satisfied sound as he finished his blood, he wiped away the remaining blood surrounding his mouth, and put the bottle on the table.

Everyone had a good time, and had good laughs. Soon everyone finished eating and went to their rooms. Clary and Will were the last ones there. Clary got up from her seat and started to walk to her room when Will grabbed her arm. She turned and looked at him. She thought he looked like a beautiful bad angel. "Yes?" she said. Will smiled at her "I thought I'd show you around some time" Clary smiled and nodded "Sure, I would love that"

Clary walked away and Will's eyes followed her. "Clary, I think I'm falling for you" he whispered.

Well what'd ya think? c: WOOOOOOOOOOOO review and let me know! Thanks for reading.