Adult son Kazuya can barely contain his excitement when Minase, his mother's friend and the radio DJ he always listened to while studying, comes to stay. Nervous, he drinks too much and passes out. Finding him endearing, Minase playfully leans in for a kiss, but Kazuya loses control at the chance to share a secret with the woman he has always admired. As the two repeatedly sleep together, genuine feelings begin to grow between them—yet Kazuya cannot ignore the sadness that sometimes appears in her eyes.