Kurozaki Hana, a former delinquent and black gyaru stepmother, is extremely competitive and hates losing—once provoked, she becomes fiercely determined. She constantly argues with her rebellious stepson, leading to endless daily conflicts. One day, the son learns a surprising secret from his father: "Hana got married because she was provoked into it." Armed with this knowledge, he devises a bold plan: "If I provoke her skillfully, maybe I can get her into sex." When he provokes her by saying someone else is sexier than her, she immediately takes the bait, insisting she's the most erotic. Riding the momentum, he keeps pushing with remarks like "There's no way you could be that sexy," eventually succeeding in getting her into bed. However, despite her aggressive attitude, Hana turns out to be an easy-to-orgasm weak pussy. From the next day onward, the son repeatedly provokes her, leading to endless rounds of intense orgasms and sex.