Isegye Yongsa Hamnak

“Fuck the hero.” “Of course… Wait, what?" A normal (?) office worker who’s fine after jacking off fifteen times in a row was summoned to another world. Who he met up with was not a goddess, but a demon lord? Plus, if he wants to return to his original world, he has to make the hero fall, something even the demon lord couldn’t do?! (Source: Lezhin, translated)