After their parents went on a trip, 'Nanami' was alone with her favorite big brother. Although he was a big brother who was completely useless at studying and exercise, she couldn't leave him alone. Nanami, who had grown up to have a bountiful I-cup chest, comforted her big brother with her breasts. 'Big brother, do you like Nanami's breasts? Today, I'll give you a lot of my white stuff, both on and in my breasts!'
