Wife Mina is suffering from a sexless marriage with her husband Eita, her body growing fuller, her emotions unfulfilled. She had cut ties with her former lover Yamaguchi, only to fall deeper into sexual frustration. One day, Yamaguchi suddenly appears at her home and forcefully pins her down. Desperate, Mina confides in her neighbor, Ginji, unaware that this plea for help will spark a whole new set of troubles.