A village boy joins battles against demi-human invaders. When wounded in combat after losing his friends, Kai discovers memories of a past life, leading him into a magical fantasy world.

Rentarô Aijô decides to date all of his soulmates after Hakari Hanazono and Karane Inda confess to him at the same time God of Love tells him that they will die if any of his soulmates fails to get into a relationship with him.