Synopsis
Shinya manages a small coffee house that employs his twin stepsisters Chiyori and Chika. After a large café chain franchise opens across the street, the siblings must come up with creative ways to keep their business alive. The girls start wearing revealing costumes to attract more customers, but when regular customer Aya becomes close to Shinya, Chika grows jealous. She decides to seduce Shinya herself, which soon causes problems for Chiyori, whose feelings toward him remain strictly platonic. Erotic high jinks ensue.