[바람난 남편 경고!] 내 감정을 느끼는 것 같았던 내 귀엽고 순진하고 순수한 의붓여동생은 내 친구 DVD에 의해 오쟁이 진 남편이었다

When my parents were transferred overseas, I had to stay at my friend's house. That's where I met up with my cute, grown-up stepsister Yui after not seeing her for a long time. I was attracted to her naive and innocent nature, and we gradually became good friends. But one day, she started to avoid me... I started getting suspicious, and I later saw her getting fucked by my friend...