Tensei Shitara Slime Datta Ken (WN)

A man takes a knife for his coworker and his fiancée, bleeding out on the pavement after a botched robbery. As death closes in, a strange voice echoes in his mind, misinterpreting his final, lonely regret. Instead of a second chance, it grants him the [Great Sage] unique skill—a cosmic reward for his virginity. Is the universe mocking him? Now reincarnated in a fantasy world, armed with a cheat ability born from pure embarrassment, he must navigate monsters, magic, and a harem of curious women, all while proving that even a clueless hero can conquer a kingdom.