One day, my husband Takayuki was decided to go on a two-night, three-day business trip for work. At the same time, Takayuki's older brother, who was unemployed and recluse, moved to Tokyo to find a job, and they ended up spending two nights and three days alone with his younger brother's wife, Hina. Hina is cheerful, beautiful and chaste, but is caught in a trap by her stepbrother and beaten up, and finally falls into pleasure. Hina, a married woman who was enjoying a happy newlywed life, transforms into a lewd, slutty married woman who cannot live without a punchline...