Hyperdimensional Universe: I have Three Thousand Ultimate Talents - Chapter 376 - : Origin of the Cosmos, The Defying Object

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.

Oosuki Masato is an ordinary high school boy who is magically transported to an alternative world, but for some reason his doting, over-protective mother comes along as well.

He transmigrated and got a system but Lin Feng’s pressure is as big as a mountain.

System main quest: Lin Feng creates a school, establishing history’s number 1 sect, Lin Feng himself becoming the number 1 founder.

And so to become history’s number 1 founder Lin Feng started to work hard.

“Your name is Shi Tianhao? Natural born supreme king but it was stolen by your cousin. Now being raised in a little village your father placed you in? Come come come, come with master, we’ll let those people know that justice that is owed must be returned!”

“Your name is Xiao Yan? A genius in the past, now a loser. Your fiance even came over and humiliated you by breaking off the engagement? Come come come, come with master, we’ll let that brat know the meaning of don’t bully a youngster because he’s poor!”

“Your name is Zhu Yi? The bastard son of a marquis, suppressed by your father. Your mother was the previous saint but she was killed? Come come come, come with master, we’ll let your dad know the meaning of the world is big, fists are… no, reason is the biggest!”

- Description from Novelupdates

There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.