Satsuki, the stepmother, possessed a special ability that tormented her stepsons. She unconsciously emitted an alluring pheromone that deeply stirred the hearts of adolescent boys. Influenced by these pheromones, the stepsons found themselves involuntarily responding to Satsuki's playful teasing. As this continued day after day, the stepsons eventually reached their limit. The story begins as Satsuki's seductive charm and mischief start to take a profound effect on their emotions.