A decade ago, Shinobu Handa and Momoko Naitou crossed paths on a playground and struck up a friendship. Prior to parting ways, they exchanged a kiss and made a pledge to reunite. In the years since, Shinobu has held onto that vow, whereas Momoko has lost all memory of it. The pair now study at the same school. Yet, their temperaments are polar opposites. Shinobu is a delinquent who accumulates lovers, while Momoko is a diligent student serving on the disciplinary committee. Shinobu leverages her flirtatious demeanor in an attempt to help Momoko recapture the connection and emotions they once held. Momoko and Shinobu’s lives become entangled in various tales of love and lust. Will these two manage to find their way back to each other?