My younger sister, Umi, has an I-cup huge breasts and a dynamite body. Umi, who received sex education in her school class, is curious about SEX. She takes a bath, takes off her clothes in front of her, and she seduces me every chance she gets. But my rationality won't last long... Umi's curiosity about her sex has increased too much, and she finally has a relationship with my friend.
*There are no performers under the age of 18 in this work.
