Instead of her parents who were away from home on a trip, she began living alone with her mother's best friend, Aina. Ryota stretches under his nose to the huge breasts body that suddenly appeared in front of him. Who knows, maybe something will happen with Aina ... The more you try not to be conscious of it, the more you are sucked into your boobs. Ryota, who can no longer suppress his excitement, is driven by inferiority and steals Aina's underwear. Still, instead of getting angry, Aina whispered, "Did you want to do so much with me?"