Maki, a wife who feels happy while her husband is addicted to shogi and is amazed at the days when he plays with his nephew Masato. One day, her husband has a sudden job and is alone with Masato. Masato, who has been secretly lusting for Maki since long ago, can't stand her unprotected sex appeal and pushes her down. She resists Maki, but because she was sexless with her husband, she felt an unconscious inferiority in his strong body, and she accepted it as it was. From that day on, their hidden libido goes out of control, throwing their daily lives into a big mess.
