Maki, a wife who feels happy while being amazed at the days when her husband is addicted to shogi and hits with his nephew Masato. One day, my husband is alone with Masato in a sudden job ... Masato, who has remembered Maki's secret lust for a long time, can't stand her unprotected sex appeal and pushes her down. Maki resists, but because she was sexless with her husband, she felt unconscious inferiority in his strong body and accepted it as it was. From that day on, the two hidden sexual desires went out of control and drastically upset their daily lives.