I'm Hiroshi. I've been dating my girlfriend for half a year now. Her mother, Ms. Ryo, is a single mom who raised her daughter alone and is a beautiful, hardworking woman with a calm and mature aura... But actually, I have a secret from my girlfriend... I've also had sex with her mother, Ms. Ryo... Both Ms. Ryo and I think this kind of relationship isn't good, but when we're alone together, we can't help but... thrust against each other.
