A/N: When I have nothing to do...with laziness to type out the plots in my head for other fics...
Based on a prompt from 0O The River Witch oO0 profile (Which has really interesting prompts by the way :D)
Summary: Chocolate. Sweets. Sugar. Tsuna is a timid, easily-scared boy but one day, Reborn makes the mistake of letting Tsuna eat too much chocolate. He bears witness to the truly hyper Tsuna.
Reborn is the number one hitman in the world and he never makes a mistake.
(No mistakes, only lessons to learn from.)
So it wasn't a mistake to let Dame-Tsuna stay in possession of the bag of chocolates the boy has bought using the moment he has gotten during the New Year.
Not mistake but a lesson to teach him to never leave any sweets near the brunet.
(Because god-damn it, he never wants to experience that again.)
"Dame-Tsuna?"
A giggle erupted out from underneath the blanket while the figure underneath squirms.
Another chuckle.
"I'm not in!"
Shrugging his shoulders, the hitman arched an eyebrow before jumping onto the bedside table.
"What are you doing, Dame-Tsuna, get up and do your homework."
A shuffle of bed sheets rustle loudly before fluffy brown hair pops out and Reborn frowns when he saw a pair of brown eyes that seems to glaze slightly.
"No! Tsuna is not in!" The boy puffs his cheeks before throwing his blankets away, startling the hitman slightly. Finding the reaction amusing, Tsuna started snickering before going into a full blown laughter, his body toppling to the ground as his arms remained around his stomach.
Reborn observed silently, not one facial muscle moved as the boy continues to roll around on the floor, laughing at his reaction earlier.
(He has never felt the urge to blast someone off the earth this badly ever since meeting Checkerface.)
"Dame-Tsuna, stop laughing."
Laughter stops ringing in the room as brown eyes widens, the brunet's gaze never leaving the hitman black, beady eyes.
Reborn inclined his head and jumps onto the floor, flicking his fedora up.
"Dame-Tsuna?"
"Dame-Tsuna, stop laughing." The boy shot back with a hint of amusement coupled with sarcasm and sass before finding the entire sentence to contain some humour and setting him off.
Reborn gritted his teeth.
'What in the world is going on?'
In the meanwhile, behind the hit man is Tsuna chewing on some Hershey chocolates, face red from all the laughing.
"Why are you following me, Dame-Tsuna?" Reborn flick the boy a look of annoyance that was easily wave aside with a gleeful grin from the boy.
"Nothing!"
Black eyes narrowed before the Arcobaleno huffed and jumps onto the sofa, adjusting his body to make himself comfortable before a flash of irritation ran through him when he heard the boy laughing before plopping himself down on the sofa, making the hit man bounce slightly.
"Dame-Tsuna…" Reborn growled before he felt a stab of horror when the brunet pulled a pin from the green grenade in his hands.
"Hehehe, let's play!"
Immediately he push himself off the sofa and kicks the grenade out of the window that was shattered in the process and turn to see half of the boy's body on the floor laughing, the other half on the sofa while ignoring the loud explosion on the other side of the street and the cursing of the unlucky house owner.
Reborn frowned. He needs to understand what had happened to his student. And fast.
(Not forgetting to tor-tutor that stupid cow about leaving grenades in the house.)
Reborn has never felt his eye twitching this fast before.
(Calm down. You can't 'accidentally' kill the heir.)
There on the floor, Tsuna stares dazedly at the ceiling, eyes fluttering close every other minute even though his mouth seems to be chewing chocolates.
"Dame-"
Lethargic eyes trailed up before the boy mouths a 'Shhh' and turns away.
(Yes, Maybe the heir could 'accidentally' choke on that piece of chocolate and die.)
"AAAHHHHHHHHHHHHHH!"
Reborn jerked out of his sleep before rushing down to the living room and damn it can't I just take a nap! Jumps in his mind, only for him to stare blankly at the boy that was prancing, freaking prancing around while waiving a cardboard sword at the TV and munching on a bar of chocolate.
"DIE YOU BEAST!"
Reborn felt a sense of regret for even thinking that the brunet was even in trouble for a second there.
"What. Are. You. Doing." Every word was said with the urge to break the finger poking his cheeks when all he did was to lie silently in his hammock while the brunet ran amok in the living room.
So why in the name of nono did the boy have to come up and disturb him?!
(Even all said, the hit man choose to take the treatment without dishing out any punishment because he knows that there is something wrong with his student but he just can't figure it out.)
"They are soft!" A giggle followed by a chuckle.
"Stop…touching it!" Reborn hissed in vehemently, only to blink in confusion, then trepidation swallowed him whole when watery brown orbs stares back and the mouth stops chewing the marshmallow chocolate.
Several sniffles later coupled with few drops of tears made the hit man sigh in resignation and subject himself to an hour of cheek poking and giggles.
Reborn sigh in bliss as he sips his coffee, ignoring the grumbling brunet that was popping Ferrero Rocher into his mouth.
Slowly, the grumblings got louder and louder and all the hit man could hear from the left side of his ears was the brunet screaming in frustration.
The baby place his cup down on the table and turns to the young sky. "Calm down, Dame-Tsuna. A boss-"
All he got was an eye roll.
"No. You need to 'calm up.'"
"Don't you start-"
"I just sent a message 25 seconds ago! WHY HAVEN'T I GOTTEN A RESPONSE YETTT!"
In the end, Reborn managed to grind his teeth until Nana comes home and handles Tsuna.
She frowns and places her hand on her cheek.
"Oh dear, haven't I told you not to eat so many sweets, Tsu-kun?"
"Yup! Sorry Mama, hehehe!"
Reborn blinks before heaving a sigh of relief and frustration. So the reason for the entire fiasco was because he has been allowing to consume the chocolates he thought the brunet was snacking on due to boredom?
How could he have not thought of that?
(But a brilliant thought then flash through his mind, making him cackle in glee. He has just the perfect punishment, fitting to what the brunet has put him through the entire afternoon.)
But the takeaway point for today, would be never to let the brunet to get overdose on sweets, especially chocolate-
Is that another chocolate the brunet is eating?!
"Hehehe…"
"Stop jumping on the sofa, Dame-Tsuna and- Put Leon down this instance!"
BTW, Autumn is so busy that the fics written by her will be suspended for a while... Hopefully not for long...