Story
After a month of dating, I was finally able to hold hands with Haruka, the first girlfriend I've ever had in my life. And on that day, my parents remarried and suddenly I had a step-sister who looked exactly like Haruka. Her name is Shigure, and it's no wonder they look alike. Shigure was Haruka's twin sister who became separated due to family reasons.
Synopsis via AniList (English).
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