Confinement King

A girl who calls herself a devil 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 doesnt 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 an unfair 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