Lesson # 0: Prologue

It seems like Reborn doesn't want Tsuna to have at least a little leisure to do anything in his own accord (not that he has one to begin with any way). But the sadist tutor really like to mess with his useless student in his own special way.

Right after Tsuna finished every stack of paper work dumped in his office, Reborn mercilessly barged into his room telling him to master every subject he has in high school and whacked him with his hammer. Had Tsuna tried to refuse the offer only when Reborn threaten him on tripling his paper works that made him stop.

Left without any other options, Tsuna was compelled onto following what the Arcobaleno was ordering him to do (despite being the true boss, he can't seems to win any arguments with Reborn). However his mind wasn't interested with what Reborn was telling him as his eyelids slowly drops as minutes pass.

"Oy Dame-Tsuna, are you even listening?" Reborn whacked his head again with Leon who shape-shifted into a hammer.

"Hiiee! Reborn stop it" Tsuna rubbed the sore spot on his head. Then he looked at his desk and noticed the textbooks and colorful folders sprawled on his desk. He remembered nothing about bringing any of these so he thought that Reborn was behind this "Anyway what's with the textbooks and folders you dumped here?"

"I got them from the mansion's library so make sure you study them well" Reborn said.

"But why?" Tsuna asked. He didn't understand why the Arcobaleno wanted him to study every content of every book when he was already passing all of his subjects and faring well. But his intuition is saying something else that shivers him all the way through his spine.

He wondered if it was yet again one of his shenanigans seeing that he was always the victim of severe unluckiness when it comes to Reborn. His quick glance to him was enough to prove that it was indeed true and saw him smirking evilly.

Then Tsuna groaned. One way or another, he still won't get any break from these insane people and he was sure of it.

"I'm sure you have heard the news that Nezu-sensei slipped on the stairs and broke his bones, right" Reborn said breaking him out of his thoughts. "And I heard from his co-workers that he won't probably be attending class for the rest of the year"

Tsuna nodded as Reborn continue speaking. Somehow behind his mind, he plan to run away from the hitman sensing the fact that something would happen but he was petrified in his seat knowing that even if he escape, he won't still escape him.

"So why are you telling me this?" Tsuna sighed in defeat embracing what was yet to come but was greeted again by the hammer. 'Curse this hammer' he groaned.

"Let me finish talking, Dame-Tsuna" Reborn said after hitting him again and cleared his throat. "As I was saying, there are insufficient teachers to take over the subjects that Nezu-sensei is handling. So that's why you, Dame-Tsuna, would be attending Namimori High School as a teacher from now on" he sternly said.

"..."

"WHAAAAAT!?"

Author's Note/s:

Short isn't it? This idea just randomly popped out in my head while reading a few fanfics and though I still have no idea how to pull this off, I decided to post this story to see if you could help me in this one. I know I have plans to continue this one but yeah I have troubles sticking with their personalities so expect OOC moments soon. Also no flames please, this is my first story on this fandom so I'm currently still inexperienced. Though I do accept constructive criticism to see where and what areas do I still need to improve with my writing style. So...that's it!