Based on the erotic game by Atelier Kaguya BerkshireYorkshire.

For some reason, Shirakawa Yu has been living with his grandparents, but he is supposed to live with his mother after an interval of more than ten years with her new husband, that is, his father-in-law. There, his sisters-in-law, Shirakaw Kyoko, Ryoko and Anzu, who have gr...