Keiichi is a young man that lives with his two younger sisters, Ririna and Momoka. While their parents are out of town for the entire summer vacation, Keiichi discovers Ririna’s vibrator in the bathroom. She agrees to do anything he wants in exchange for keeping quiet about it.

Tomoya has unleaded the more sexual side of Kisara, improving her work tenfold, and Flower’s latest work has greatly improved thanks to his help. However, Momoka and Iori still want Tomoya to provide them with some ‘first hand experience’ for their work.

Flower, an H-Game development-company has fallen on hard times. Their previous game failed, and their next needs to sell if they plan to survive. In a desperate attempt, they hire Tomoya, a self-professed ‘H-Game professional’ to set them on the right path. Its only then that he realizes that Flower is completely staffed by women who like to work in their underwear!