dungeon livestreamer- I dungeon dive with my disaster with women

a fate enjoyer dies by a shooting star and enters a world with dungeons, only one problem, his only skill is useless…or was it? on a normal dungeon dive where his classmates/bullies die to an S-rank boss and right when he is about to die, his skill activates and he meets Tiamat and bonds with her. now armed as a summoner with the skill disaster with women(ex), he enters Chaldea academy(not fgo based) to become the hero he always dreamed to be. (note: mc isn’t an idiot with suicidal heroic ideals, and will kill evil hunters if they provoke him, as for lemons with any heroines or servants, I’m not sure.)