Rena-chan, who is always carefree and natural, will seduce her sister's boyfriend "cunningly and cutely" in revenge for being scolded by her sister! Rena, whose frustration of being scolded by her sister every day finally exploded, plans to seduce her sister's boyfriend. She takes advantage of the opportunity when her sister isn't around and brings him down with her inherent cuteness and "cunning gestures" and "cunning words" that make her big, bouncy breasts bounce... Her figure is truly that of a little devil! But if she can do such a horny thing, maybe it's okay to be deceived!?