Mihina Nagai, the younger sister who comforts her brother after he's been dumped by his girlfriend and even helps him with his sexual issues (KIR-057)

A meddlesome younger sister, wanting to cheer up her breakup-stricken brother... wants to become his sex slave?! The gentle younger sister's fiery passion is unstoppable! Even though she knows it's wrong... the younger sister is just too cute to resist!