MTL - Pirates: The Revenge of the Family, Kill All the Tianlong People! - Chapter 6

A cursed CD game falls from the sky. I boot it up, build a ridiculously handsome villain with broken talents, and just as I hit “Start”—boom, I get electrocuted.Now I’ve reincarnated as Lucien Caelum Valebrandt, a six-year-old noble and the infamous villain who helped the Abyssians win the last war.Every 500 years, the Abyssian King is reborn. But when the 16 chosen heroes of this generation lost against the battle of the Abyssian King because of my character, the Goddess panicked—and rewound time.Now those same heroes remember everything… and they want me dead.Even though I just got here.All I wanted was to play a game. Now I’m the villain blamed for destroying the world.

This is a story about a legend, of one that can never be forgotten.
Summer, first time down the mountains in 16 years, after being raised by his 3 masters and Fairy sister.

‘Why won’t you follow the Rules of society?’ The rules are the tool made by the strong, so I follow my own rules.

‘Why won’t you just use your brain instead of your brawn?’ Idiot! Have you ever seen anyone use their brain, to get back at an ant that bites them!? No, they just casually step on it.

‘Oh, everyone says you’re a first-class beauty huh?’ well, I’m sorry but even you are not qualified to be my wife. Only a ‘Summer class beauty’ is worthy enough!

‘My enemy is sick?’ Oh, don’t worry, even if you’re on your last breath and I feel it’s beneath me to slap shot you dead. I’ll just fix you up and then beat you!

‘Who am I?’

“I am Summer in the spring, the autumn, and the winter, I’m the world’s first above the heavens!”

Follow me, Summer Day as I step by step become known as the world’s first master, the world’s first doctor, the world’s richest man…… a lot of other world’s number one, but most importantly, The worlds happiest man.

- Description from Novelupdates

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.