Jibun, my name is Hiroshi. - I've been dating my girlfriend for half a year. - Her mother, Yuki, is a beautiful, hardworking, and calm adult woman who raised her daughter by herself as a single mother. - But in reality, without telling her, I have also had sex with her mother... - Yuki-san and I both think that this type of relationship is not good, but when we're alone, we end up bumping our hips against each other.