Cheeky and lewd sister-in-law... Yuzuna Minamotokawa
One day, my brother suddenly has a cute step-sister due to his parents' remarriage, and he is worried about how to deal with her. Ignoring his brother's worries, Yuzuna sneaks into his sister's private life. Yes, Yuzuna is interested in her brother as a man! Yuzuna uses her immature body as a weapon, and her brother has no way of doing anything.
