Secret sex between best friends and brother and sister.
Her caring older sister: Aoi. Serious younger brother: Haruto.
The two are good friends, but Yoto, who is now in the XX grade, begins to feel aroused by his older sister’s body.
Aoi sees Yoto’s erect penis and decides to take off her clothes for her cute little brother…
21 pages of text, 1 page of cover
pixiv:https://www.pixiv.net/users/74218630
