Hello! This is what transpired after a stray thought: What exactly was Lambo doing before his 5-year-old self blasted him into changing positions using the 10-year-bazooka? And what did the 20+ year-old Family members do with the 5-year-old Lambo when he appeared? Hope this entertains you if even the slightest bit...

"I got it, principal. Sorry for the inconveniences caused."

Tsuna sighed as he put down the phone and looked straight at the 15-year old who was summoned to his office.

"Were you running away from your homework again, Lambo?"

Lambo slouched over like a rebellious kid being rebuked.

"I ain't all my fault, I have that paperwork you gave me-"

"Lambo, your paperwork load is the LIGHTEST! And all you gave me were chicken-scratch five-liners!" he cried out, waving Lambo's half-hearted report in the air.

Lambo managed a sheepish smile.

"Well, I'll just get back to that homework so-"

"TO-PING!" A familiar sound rang as a puff of pink-tinted smoke enveloped his figure.

Tsuna's eyes widened in an expression of mild surprise. "Oh, and it's been a really long time since this happened."

"! That hurt! That hurt!" The five-year-old sobbed.

"Hai, hai, hai." Tsuna scooped him up. "Would you quieten down if I gave you this, Lambo?" he held a grape-flavored candy drop in front of Lambo's face.

It worked like a charm. The five-year-old stopped crying immediately, took the candy drop and sucked on it. "S-so who are you, Porcupine old-man?"

"P-porcupine old-man? Ugh, he forgot about me. Oh well, I'll let this slide."

"Did you forget about me Lambo? It's Tsuna. I used to live-"

A succession of firm knocks came from the direction of the office door.

"Come in."

"Tenth, the file you wanted on the Estraneo survivors… Ah! That stupid cow!"

Tsuna sighed again. That nickname… it's been ten years, and you think they have matured enough to stop calling each other such names.

"Pass the kid to me, Juudaime. There is no need to bother yourself with babysitting when you are already troubled with the Estraneo freaks wreaking havoc."

Tsuna smiled. Oh well, they did grow up. "Okay. Thanks for being so thoughtful, Gokudera-kun."

He extended his arms to let Lambo into Gokudera's reach.

To his surprise, Lambo took a look at Gokudera, shrieked at him, and scrambled back up Tsuna's arm. "GUPYAHHH! Don't let that octopus-head touch me! He'll BOOM me again!" he wailed.

"Oh, it seems this incident was your fault, Gokudera-kun. You must have used your dynamites on him again."

"I apologize, Tenth. You know how brash the old me was."

He let out a chuckle.

"Whatever we've done in the past, we did because we were inexperienced brats. Those were fun times though. Well, it seems like he won't let me leave him alone with you, so I'll hang on for the remainder of the five minutes."

He said, looking down at kid who still clutched on to his shirt tightly, staining it with his sticky, candy-coated hands, and mucus.

A puff of pink smoke erupted again, and Tsuna was shocked at the change in weight.

"Oh, Vongola." He noticed that he was being cradled by his boss, and jumped up quickly in embarrassment.

Tsuna glanced up at Lambo's head, which had an unbelievably large swelling on its side.

"Oh, Lambo! Where did you get such a huge swell?"

"I went back to the day we first met. Brings back some memories don't you think?"

Tsuna was about to reply when another person entered the room. A very small but scary as hell person.

"Tsuna, what's all this racket about? I thought I told you to keep it to weekends."

"AHH! REBORN! I'll just be getting back to that homework, Heh! hehe" Lambo called as he sprinted out of the room.

Reborn smirked, stroking Leon.

"Tenth, what's with him?"

Tsuna shrugged.

But he knew.