Description: We live in a society with a declining birthrate where great extermination is respected, and cuckolding is recommended if you want to impregnate someone as a delinquent. The protagonist lives in such a world, and as a result of hearing false boasts about his lower body every day from his five friends, he loses confidence in himself and lives a humble life. However, one day, one of his friend's mothers looked at his crotch, and it turned out that he was actually one of the world's biggest exterminators! The main character, who has found himself, seduces the beautiful women he has always admired -- the mothers of his five friends, each with a different type of beauty, one after another. In this way, he begins a harem life where he can impregnate his friend's mother and release his pent-up feelings.