Ayumi raised her only son, Koji, alone after losing her husband early. She had been living a small but happy life when she noticed something amiss with Koji as he entered puberty. As she pondered what to do, she discovered stains of semen on his underwear. Determined to teach her beloved son the right knowledge about sex, Ayumi decided to personally guide him through it. However, before long, she found herself wearing an expression of ecstasy as her son's rapid thrusting...
