mio saionji, who has been living with her daughter and son-in-law for the past six months after divorcing her husband and raising her daughter alone. somehow, whenever she drinks alcohol, she starts to want a man's body and masturbates. one day, when mio returns from going out, her daughter and son-in-law are having sex. mio, who happens to peek in and gets excited. that night, she had a drink with her son-in-law. mio, who had her switch turned on after drinking alcohol, reaches for her son-in-law's lower body. even though i've been holding back until now…