Your mother is a perverted woman obsessed with penises. She became a masochist after her son's friend called her out as a woman. (Morisawa Kanna DASS-406)

Ichiro's friend, Himori, falls in love with Ichiro's mother, Kana, and bravely confesses his feelings... Initially, he's just joking, but after her husband dies in a car accident, Kana becomes a lonely woman. Himori knows she's serious; before becoming a mother, she was just a woman... So they begin dating. Then, their relationship grows closer! When Kana is faced with a young penis, she becomes obsessed! She transforms into a perverted woman, recalling her past as a pervert, and utters lewd sounds: "I like young penises!"