Akiyoshi Wataru is an ordinary student. He goes to cram school, hangs out with his friends, and does what boys his age do: chase girls. One day, a specific girl, Iwashita Ayane, catches his attention at cram school because of her red fingernail. Later in town, he sees a familiar girl and follows her. But the girl enters an image club. A brothel that specializes in cosplay. What's more, one of the girls working there goes by the name of "Ayane." What does that mean? And what will Wataru do?