Different world [continuation]

Guy who is useless as a teacher is taken to a school for youkai due to his family heritage. All kinds of weird situations later and he becomes quite attached (after he will overcome his fear that is).

Guy dies by accident and is send to another world to live his life as he wishes. After no human contact for three years he has an army of mutated slimes, but now he sees a party at his doorstep with a wounded member....

Guy used to be the strongest swordsman and dies after an epic battle to test his skills, as an award he is reincarnated and by accident remembers his previous life. He used to be very weak, but now with all his knowledge he becomes overpowered with a unique skill.

Guy is reincarnated with cheat abilities and spends most of his time in the brothel, let's see where it goes...

Guy plays games with a party and finds out that most of the members are people from his direct environment. And yes he is traumatised by a female avatar who turned out to be a man, but now he falls in love (harem?) again.
Has an anime.

The chapters are not the same as the description.... Hopelfully that will change.