The super popular Morihiga Ko is driven mad by her cute and cunning little sister! One day, her boyfriend comes over to play at their house. The boyfriend-less Higa Ko can't help but feel jealous as she watches her sister show him off. Unable to control her impulses, Higa Ko seduces her sister's boyfriend with a sweet voice. Transforming into a clingy kiss maniac, Higa Ko's lovey-dovey attack sends the boyfriend into overdrive! He ends up going at it like crazy behind his girlfriend's back.
