Mary lives in a quiet neighborhood, struggling daily to balance her household duties with accounting work and community cleanup shifts. As her frustration with the town grows, she's approached by chairman Nakata to join a local mothers' volleyball tournament. Unable to refuse, Mary reluctantly agrees and begins attending weekly practice sessions every Saturday. However, she discovers the only participants are a handful of middle-aged men, with no other women in sight. The men stare at her with gleaming eyes, flustered by her presence, lavishing praise on her voluptuous figure while hurriedly urging her to change clothes—soon crossing the line into blatant sexual harassment under the guise of coaching.