"Suzuri's sister" is a housekeeper at a mansion. His mother is away from Japan on a long-term overseas business trip, so his lonely Sota is distracted by playing with her sister Suzaku. However, he was depressed by his bad friends and even though Shota pretended to be lonely, he was sluggish with Shuri's sister's deca butt. I set up a night groaning with my sister who is completely relieved ....