Disclaimer: I do not own My Hero Academia. Or Izuku. Or Bakugo. I also do not own Undertale. That is owned by Toby Fox. I do not own any Parody Songs related to Undertale. They are awesome though.
Note: Not all of the rules are known to Bakugo.
This chapters will now be set within the Hero School and not just in the past. The first rule was just an intro.
Bakugo paled as everyone in Class 1-A was starting a discussion on food they hated and loved. Then someone asked Izuku what his favorite food was. His smile lit the room. No one noticed Bakugo behind him waving his hands and shaking his head frantically in a stop motion.
When Izuku answered with Katsudon various subtle things happened. Bakugo's head slammed on his desk. Kirishima said loudly at how manly katsudon was. Then a squeaky voice that came from the perverted midget said grapes were better.
Izuku narrowed his eyes at his shorter classmate. His eyes started to glow menacingly. His new strength seemed to flood him with a green crackle with sparks of lightning dancing off his skin. Most of Class 1-A gulped and started to distance themselves. Nice Izuku seemed to shift as his smile grew.
Before Bakugo knew it a person tapped his shoulders. Kirishima was right behind him looking confused between Mineta and Izuku. Bakugo shuddered. Kirishima asked what was wrong. Bakugo's red eyes stared into the hardening quirk user and whispered softly with a fast intensity.
"Rule number two. Never insult katsudon. He loves it. Just watch and warn the others about it."
Aizawa entered the classroom. Izuku turned to normal. Everyone sat in their seats when a loud fart sounded out from Mineta's chair. A bag was underneath him. Aizawa told him to go the bathroom if he had business to take care of. He went to the bathroom and came back. Bakugo saw Izuku switch pencils with Mineta before the shorter boy sat down. As he was about to take notes his pencil snapped. It was apparently hollowed to hold wet paint as everyone noticed pink paint spill onto his paper, desk, and even his uniform.
Mineta left to go get his gym clothes and came back in them. Snickers went all around the room. Class ended. Izuku stood up with a smile and asked Bakugo "Is katsudon awesome or what?"
"Only Aunt Inko's." Said Bakugo with a rehearsed smile and cheerful voice.
Izuku grinned wide and nodded his acceptance. Next class was math. Izuku went to the restroom inbetween breaks. When he got near his seat he seemed to trip. Coincidentally he had a water bottle that went up in the air. Ochaco watched as gravity controlled the descent of the water container.
It fell right on top of Mineta's desk near the edge standing straight. He jumped in his seat and kicked the desk. The lid apparently wasn't plastic but ten pounds and was also not secured on the bottle so it fell directly between his legs. He squeaked in shock and a wince. Shoto Todoroki heard his pain and winced. A yelp sounded and everyone turned to the little pervert. The sound of a metal weight hitting the floor accompanied the sound of dripping liquid. Girls giggled and boys snickered.
That seemed to be all for the day until their hero class. It was going to be teams of heroes versus villains. Each team was given a pack of random items to use. All Might had said it was another version of capture the flag.
By this point Kirishima had warned everyone about what was happening and that somehow Izuku was causing it.
"Hey Izuku?"
"Yes Bakugo?" Red eyes met green.
"Can you just deal with the Hair Ball already?"
An eyebrow rose. "You know I have read your rules right?"
Bakugo flinched. "I know. I'll try to teach everyone. Except any villains."
"Okay!" Izuku clapped his hands. A grin grew on All Might's pupils face. "Here. You'll need this. I already have the stuff I need."
Thus the game of heroes versus villains went.
Now the aftermath of the game was known to all. Bakugo had won the game with Shoto Todoroki and overwhelming power. For the purple ball haired boy though... Being found by everyone as he fell onto the pole with his pants of his hero suit, with his underwear pulled up over his back and over his head with a big apple in his mouth was quite the sight. Izuku had just appeared by Bakugo with a light grin. A "Hehehe..." was heard as he scratched his head.
The class would never look at katsudon the same way ever again.
When looking at the particular incident through video cameras the principal could only laugh. "Oh my!"
Bonus with Villains on rule #1 #2
The League of Villains had taken Izuku to their lair within the bar after capturing him on his way home through a portal made by Kurogiri.
The only people in the room were Tomura with his villain costume and the acting barman Kurogiri. Izuku had his legs cuffed to the bar stool and his arms were put into cuffs that connected to the counter. Tomura was asking questions to the cinnamon bun until the boy spoke of dinner. Then everything went downhill. It went a little like this.
"What would you like? Kurogiri can fix it!"
"Katsudon!"
"What? Why not dumplings or ramen? Even Sushi is better."
"Katsudon is cheap. I heard your mother always made it. Does this mean your mother is-" The room seemed to darken. The cuffs broke. The bar disappeared. Pure darkness seemed to hold them in air.
Tomura stared into the open space. Suddenly a marvelous hall appeared. Golden tiles were bathed in sunlight as birds started to chirp in a tune. Long windows ran between majestic pillars.
Four huge buttons appeared before him. Fight. Act. Item. Mercy. A heart in a third dimensional form in a red color appeared a foot away.
Then the Megalovania sound track came on. He said only a few words each time it started. The battle seemed to never end as after each death of the villain time would be rewound to the beginning of the fight.
Each time they fought Izuku would grin. Oh how Tomura started to loathe the grin. After Izuku started to lose count of the ways he could 'deal' with the villain, he decided to end it.
The sound of heavy breathing filled the air. Izuku clapped his hands. "Well, I got to hand it to ya! It's been fun! Next time I'll find another way to deal with ya. You better be careful or you'll be dealt a handfull of trouble for yourself. Now I am going to leave you at the bar. Hopefully you've learned your lesson, eh? See ya around."
Blue seemed to surround the boy as he left and everything turned back to normal. Kurogiri blinked as he only saw the two of them flicker and Izuku was gone. Tomura looked horrified. When he started to mutter about bones, gravity, puns, birds, and flowers underneath Tomura's breath he was concerned. Then he shrugged. It didn't matter to him after all.