Momoko has soft, chubby cheeks and an innocent smile that define her cute appearance. Although she should have already gone through her second growth phase, her bust hasn't developed at all, which has become her biggest concern. While her classmates have already started wearing bras, Momoko is still an A-cup and claims it's too early to ask her mom to buy her one. Once, her older brother bought her a bra online, but the strawberry pattern was so embarrassing she refused to show it—though she shyly agreed when he said, "It's okay if only I see it," so things should be fun for a while. Her buttocks have grown nicely round, but she doesn't seem to have any pubic hair yet. Since they bathe together every day, he's already confirmed that much... Lately, Momoko's been acting a little different—when she stares at him with her pure, innocent eyes, her cheeks turn bright red. Could it be... she's becoming aroused by him!? (21st Century FAX)