Hey this is another idea bloomed in my mind in the past few days so here goes.

CHAPTER 1: Arrival

Year 850, the war still rages on between humanity and Titans. Eren Jaeger, a 15 year old member of the Scouting Legion along with Mikasa Ackerman and Armin Arlert are fighting off Titans who are mysteriously appearing inside the wall.

"Hey! Go to the west side now!" Corporal Levi, who is their squad leader ordered.

"Roger!" They replied as they finish off their own Titan opponents and moved to the west side.

Meanwhile:

"I pray those clothes will bring you back to our country." A girl with brown hair and green eyes clothes to the men leaving especially the boy with brown hair and eyes. The rabbit animal grew wings and it spread to the 3 men.

As they we're leaving, the girl ran to the boy and they held hands.

"My real name is…" they said as they stare at each other's eyes. "Tsubasa…" They we're surprised and smile one last time to each other. And the boy with his companions left to the next dimension.

"Since we can meet again, absolutely…" The girl, Tsubasa said as she looks through the horizons where her beloved, Tsubasa left.

In the portal:

"So, Shaoran-kun's and Sakura-chan's real name is Tsubasa, huh?" Fai D. Flouritte said to the boy named Tsubasa.

"My father's name is Shaoran, Fai-san." Tsubasa replied.

"Your father" The man with black hair said.

"You met him, Kurogane-san" Tsubasa said to the man, Kurogane.

"I know, and he looks a lot like you." He replied.

"We're at the end of the portal, be ready." The rabbit animal said.

"Yes, Mokona" Tsubasa replied to Mokona.

The light came from the end and flashed through them.

Meanwhile:

"There's no end to them!" Armin cried as he slashed the Titan's nape.

"Don't give up, Armin." Eren shouted to his friend as the light came.

"What the…" Eren said as the light disappeared and 3 men appeared before them and a 15 meter titan was approaching.

"Hey!" Eren shouted to the mysterious men.

"It's dangerous there! Run!" Eren cried and instead of heeding Eren's word of advice. The boy with brown hair took his sword and jumped real high and slashed the titan's nape.

The titan stumbled down and the boy landed on his feet perfectly. Eren maneuvered toward them and as he landed he shouted at them.

"I told you to run, didn't I? It was dangerous you know."

The boy took away his sword and raised his hands.

"Sorry, it was instinct." The boy replied.

"Eren! Are you okay?" Mikasa asked as she landed with Armin and Levi.

"I'm fine. The 3 appeared out of nowhere." Eren replied.

Levi took a step closer to the strangers.

"Who are you and what are you doing here?" he asked intently.

"We are travelers of Dimensions, I'm Tsubasa Li, the man with black hair is Kurogane, the blond one is Fai and the animal is Mokona. We are just passing through here and somehow you need our help." Tsubasa replied politely.

"How is that so?"

"We can only visit a certain dimension if it needs our help." He replied.

"Is that so? Eren!" Eren went next to Levi.

"Take them with us to HQ."

"Understood, Corporal" Eren went to Tsubasa.

"Follow us."

They jumped, maneuvered whatever you call it and arrived at HQ.

"Is Erwin here?" Levi asked a man standing at the gate.

"Not in the moment, Corporal." Levi nodded and took the guest to the meeting area.

END OF CHAPTER

I'm in the serious case of Levi addiction in the past few months...

I need to get a grip...