A man is reincarnated as Kai, a minor villainous slave trader in an RPG world destined for ruin. To avoid his bad ending, he rescues captured heroines and safely sends them back using items he collected before reincarnation. However, his actions make everyone misunderstand him as a powerful, heroic figure. Instead of being ignored, he becomes admired and loved by noble heroines, leading to an accidental harem fantasy.