Shizuka, who aspired to become a teacher, married her supervising instructor during her teaching practicum and continued her career in education. Unexpectedly hired as a temporary staff member, she now finds herself teaching at the same school where her husband works, filling in for a colleague on maternity leave. However, in her assigned class is Yuuki, a delinquent student notorious for his cruel behavior that moves people to tears. Intrigued by the shy and gentle Shizuka, Yuuki begins provoking her with deliberate actions. As Shizuka's kindness touches him, a forbidden relationship slowly begins to unfold.