Arisu, mother's close friend, captivates Yuuta with her beauty. As a pubescent boy, he finds himself irresistibly drawn to her physical charm. Her soft, voluptuous big tits sway even through her clothes, making his face flush with desire. Yet, with an important exam just one week away, he cannot afford to let these temptations distract him from his studies. Sensing Yuuta's inner turmoil, Arisu whispers, "Let me show you a way to focus on your studies," and begins to lead him down a forbidden path.