Rentaro Aijo has spent middle school being rejected by every girl he likes. When he visits a love shrine the night before high school starts, the God of Love appears to explain a divine clerical error: a hundred girls have been fated as his soulmates. Each is cursed to misfortune, or worse, if he fails to be with her. Rentaro resolves to date all hundred at once. That same day, Hakari Hanazono and Karane Inda both confess to him simultaneously, one ecstatic, one furious.