DOCP-122 — "You Like It Even If It's Small...?" A Little Sister Who Is Troubled By Her Small A-Cup Breasts And Goes Around Without A Bra Tries To Make Them Bigger With The Help Of Her Older Brother...

The younger sister, who is always worried about her small breasts, searches for "ways to make breasts bigger" and finds an article that says, "When you are touched by the opposite sex, female hormones are secreted and your breasts may become bigger." But she doesn't have a boyfriend... Oh, that's it! I'll get my brother to touch me! She is enthusiastic. At first, she thought it would be okay if he touched her lightly, but her brother's skill makes her feel more than she expected, and she ends up having incestuous sex that makes her cum a lot!