JUQ-059 My beloved sister-in-law, who raised me single-handedly, was cuckolded by my worst friend... Mizuki Yayoi

Mizuki and I aren't really siblings. - We met when we were students, as stepchildren of our parents' remarriage. - Several years have passed since then, and after their parents died in an accident, the two of them lived together, supporting each other. - As we continued to live together, I started to fall in love with Mizuki. - His dream of being alone with Mizuki is taken away by his best friend, Kyohei. - Kyohei, who is in love with Mizuki, becomes jealous of our relationship and suddenly approaches Mizuki when I'm not around...