Sei Saisu is a grim reaper staring school at Death Weapon Miester Academy, or the DWMA. She runs into Death the Kid, the grim reapers son, and they click because of their love for symmetry, even though she's a symmetrical beauty in Kid's mind, and he's perfect being Asymmetrical for sei, but will her Keshin family get in the way of their relationship? Will her engagement to her weapons brother strain the relationship? Or will Kid's number one obsessed fan club leader Hentri ruin other plans?