Masami, who doesn't want to give up her wealthy life, is desperate to be loved by her husband. If she tells her husband that her brother-in-law Kotaro, who comes to visit her from time to time, is "flirting" with her, will he get jealous and protect her? With that thought in mind, Masami tries to seduce her brother-in-law and get him in the mood. However, she is unable to stop her brother-in-law's rampage once he gets serious, and ends up giving in to her body.