One day, Eiyuu, who lives alone, meets Yuki, a married woman who comes to the laundromat because her washing machine has broken down. As Yuki is leaving, she drops her underwear right in front of him. Without even a word, Eiyuu takes the underwear home with him. A few days later, Eiyuu meets Yuki again at the laundromat. In the awkward atmosphere, Yuki drops her underwear again! Unable to contain his excitement at this second lucky break, Eiyuu takes it home, but that night, Yuki suddenly comes to visit him...