Boku ni Harem Sefure ga Dekita Riyuu 3

For Nanasu, a shy boy, "Rina" assigns a masturbation ban until their next gathering. One day, after holding back to the limit, he receives a message from Rina saying, "Let's do it now." His heart skips a beat. A four-person swimwear date with Rina, Megu, and Mio starts, and Nanasu's excitement reaches an all-time high. However, their teacher, Yukka, with her large breasts, suddenly appears, causing the four to panic and hide in a locker. From the locker, they peek and see girls in swimsuits in a packed train-like state. Nanasu's self-control is on the verge of exploding...