DHLD-011 A younger sister and her friend stay overnight for a study session before a test. As they become so focused on studying that they let their guard down completely, their pure white underwear is repeatedly glimpsed, and the room fills with the sweet, youthful atmosphere of their teens, pushing my desire to its limit.

While our parents were away, my younger sister brought her friends over and held an overnight study session. Feeling safe at home and focused on studying, they became careless, and their skirts kept riding up, giving me plenty of accidental glimpses. Their cuteness was overwhelming, and I reacted immediately. Noticing my obvious reaction, the girls—curious about romance and fond of teasing—started deliberately showing me more to see how I would respond. Before long, they came over to me, and I ended up getting flustered as they kept testing my limits.