Maybe a Fake Gintama - Chapter 24: Children Don’t Need to Know [This Way and That Way and Every Other Way]!

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.

A guy became a brother of Iron man and got the ability to extract genes from anyone. Lets see how he changed the Marvel World

- Description from Novelupdates

Should an untalented guy like me die?Then I’m going to die.I will die as you so desire.After dying, I will challenge the world again.Until I kill this tr*sh-like world!

[By the Author that brought you “Return of the Frozen Player”!]The Return of the Fallen Tower Master: The Revival Era of the Magic Tower