In Full Moon Night, after the events of Paizuri University, our protagonists, a cute girl with pink hair named Kareen and a photography major named Bill, move in together. Kareen’s behavior has been out of the ordinary recently, and Bill needs to deal with it in the only manner he knows how. This focuses on the age-old question of how couples deal with each other. It won’t be long until they realize that some of their clashes end up being so wildly over the top that they stun each other.