Seeing is believing when you see your sister's huge breasts. Jan. 2014, J-cup, 111cm, Shiori Tsukada.

An older brother who wants to save money by using his younger sister's large breasts. He hears rumors about a photoshoot where he can save money, joins the group "Seeing is believing," and is lucky enough to get a lot of bookings soon after joining. However, his younger sister, Shiori, unaware of this, is suspicious of her brother's photoshoot modeling. Then, Shiori, the older brother's sister, takes off her clothes for him…