What action did my brother take when he learned the secret of his sister! This project is an erotic depiction of the sadness and joy of four brothers and sisters that develop from the secrets of the family. Suri, a younger sister with a perfect score, Hikari, a girl with a mysterious atmosphere, Riko, a younger sister who is plump and free-spirited, and Mitsuki, who has been developed by her father. Please enjoy the forbidden story between the four beautiful girls and their brother!
