Rinko Kinoshita, A Friend's Mother, Comes To Pick Her Up After Cram School.

My parents are workaholics and have no interest in me at all—. I always eat the pre-made dinner alone. I'm used to that life by now. But... that day, after meeting that person, my life changed. It was Rinko, the mother of my best friend, Daisuke. Daisuke and I went to the same cram school, but by chance, Rinko gave me a ride home in her car. I fell in love with her beautiful profile as she drove and the way she smiled at me. And then, I never imagined I would end up in such a relationship with Rinko... A forbidden relationship I can't tell Daisuke about...