In Heaven, Cupids work hard to ensure that the people on Earth connect with their soulmates in order to keep their bonds from breaking. Cupid 5,931 is coming to Earth in order to help Hisamatsu Kokoa and Kubota Yukito fall in love with each other. The only problem with this is that their souls have been reborn into rival classmates who can never see eye to eye. Will Cupid 5,931 complete her task of letting these two souls come into union or will their bonds break, filling their souls with hatred?