Disclaimer: I DO NOT own Katekyo Hitman Reborn! It belongs to Akira Amano-sensei. I don't own Durarara! as well-it's Ryohgo Narita-sensei's.

Anyway this is my first fanfic (and crossover), so please bear with me xD.

Timeline in KHR!: 2 years after the Curse of the Rainbow arc. In other words... the manga's ending -_- . Tsuna has accepted to being the 10th Boss, but he's not yet THE boss.
Timeline in DRRR!: Sometime after the anime, after Kida went away. I'm not sure if Kida-kun or even Kuronuma Aoba will show up. I-I guess it's up to what will happen =w=

Sawada Residence, Tsuna's Room – Namimori, 5pm

Reborn summoned Tsuna and the guardians for a certain announcement.

The young Tenth Generation all sat comfortably in the room, still donned in their uniforms. It was already the end of school, and summer vacation lies ahead. Naturally, Hibari wasn't there.

"Everyone, we're having a trip to Tokyo." Reborn declared straightforwardly.

"EH? T-TOKYO!?" Tsuna echoed.

"Yeah." Reborn replied with his usual smirk. "We're going to Tokyo—specifically in Ikebukuro. We're meeting someone there."

"YAY! A field trip!" Lambo, who was sitting on Tsuna's bed, excitedly jumped.

"YOSHAAA! IT'S A FIELD TRIP TO THE EXTREME!" Sasagawa Ryohei, who was sitting in front of Tsuna and Reborn, yelled as he raised his fist.

The person sitting on Tsuna's right, Gokudera Hayato, glared at Lambo and Ryohei. "OI! Keep it down, Ahoushi! You too, Lawn-head! You guys are annoying me!"

"What did you say, Tako-hedo!?" Ryohei glared back.

"Maa, maa." Yamamoto Takeshi who sat on Tsuna's left, looked at Hayato with a smile. "Lambo's just a kid. Yelling at Senpai's not any good, too."

"Tche." Hayato looked away.

"E-ehehehe..." Tsuna scratched his head with a (=u=) face.

Lambo grinned and held out his tongue to Hayato.

"AHEM!" Reborn now used a mini-megaphone he took out of nowhere. Everyone squinted. "Anyway, the trip is tonight."

"Oi oi oi oi, wait a minute!" Tsuna thought that this was a bad idea. "Summer vacation has just begun!"

"What are you saying? That's exactly why I arranged this trip to be tonight." Reborn tilted his head as if it's the most obvious thing. "We won't be able to go to Ikebukuro while school is going on, and we're staying there for a week, so-"

"A week!?" Tsuna emphasized the word, looking a little bit frustrated. What a day.

"Ahaha, don't worry, Tsuna. I'm sure it'll be okay there." Yamamoto reassured him. "By the way, who are we meeting, little guy?" he turned to Reborn.

"That will be a secret. You'll know when you get there." Reborn simply answered.

"I see."

"So," Reborn looked at everyone. "Is everyone going?"

"What about Hibari-san?" Tsuna asked.

"I'll go invite him myself."

"Eh? Hibari's going?" Ryohei reacted.

"That depends on his decision."

"OKAY! Lambo-san's going to Ikubukurubu!" Lambo raised his hand as if volunteering in a magic show.

"I'M OBVIOUSLY GOING TO THE EXTREME!" Ryohei agreed as well.

"I'll go, too! And that's 'Ikebukuro', Lambo." Takeshi raised his hand while correcting Lambo.

"Then I'm going, if it's for Juudaime!" Hayato enthusiastically clenched his fists.

"I-I'll go... I think it'd be nice to go there." Chrome shyly and awkwardly raised her right hand.

The group looked at Tsuna expectantly.

"E-eh...?"

"Your turn to say 'yes', Dame-Tsuna." Reborn told Tsuna, expecting something.

The way he said that... It's like I don't have a choice, do I?

Tsuna sighed. "F... Fine! I'm going!" Think of it as a vacation. A VACATION!

Reborn smirked. "Okay. Pack your bags. We're meeting in front of Nami-chuu tonight at 10pm."

An apartment near Kawagoe Highway in Ikebukuro, 8:30 pm

A certain man in a white coat lazily held a cellphone to his ear.

"Moshimoshi...? Who's this..." he sleepily answered. He was about to get to Dreamland when his phone was ringing. It might be important, so he had to answer it.

"It's me. You seem to be not in the mood." a voice-the caller responded.

"Huh? Is this Orihara Izaya?" Shinra closed his eyes. "M'kay, good night." He was about to hang up when the caller responded in a louder voice.

"It's Reborn. Seriously, you better wake yourself up, Kishitani Shinra."

"A-ah." Shinra scratched his head. He could hear a sigh coming out from Reborn. "S-sorry for the rude reply. What's with the call? Is it about those youngsters you want me to meet?" he asked, now in a more attentive and better mood.

"Yeah," Reborn replied. "They might be coming over there not later than 12 midnight."

"Gotcha." Shinra spoke excitedly. "But how do you plan on bringing them here? By a limousine!? A Volkswagen car? By helicopter or plane?!"

"Don't be silly. They'll come here with me by train." Reborn smirked.

"Heh. As expected of a home tutor." Shinra smiled. "It's a wise answer. Like they say, 'Learn the manual way first before the automatic one,' right?"

He heard a proud "Hmph" from the end of the line.

"Then I'll be waiting. But let me sleep first, 'kay?" he yawned. "Bye, Reborn-kun." The call ended. Shinra snuggled comfortably on his bed and went back to sleep, but not before he muttered:

"I hope Celty My Honey will be back already..."