Sakura, heartbroken after a physical encounter with her senior coworker Keisuke turns into cold rejection, finds herself unable to let him go. In her despair, she meets Zakuchan, a blunt "fairy of love" disguised as a doll who harshly scolds her choices. Guided by Zakuchan's strict romance lessons, Sakura sets out to transform her unrequited crush into becoming Keisuke's true girlfriend.