If you get lots in a game-like world that you don't remember playing

After being reincarnated as "Makoto Inosaki" in a game-like world with dungeons, I enroll in Dungeon Academy. In a game-like world where I have no memory of playing and haven't even met a god-like existence, Makoto Inosaki, a mob character, aims to dominate as a "Transcender" and conquer the depths of the dungeon!