700VOTAN-012 My Precious Younger Sister Has A Boyfriend. From A Jealous Boyfriend Big Strategy Ena Kasuga

Ever since my parents passed away, I have been living with my younger sister. Brother and sister, we were always together, shoulder to shoulder. It's very painful to have to say "was" in the past tense... My younger sister, who started going to college this spring, went to a coeducational college, which was very different from the escalator style of consistent middle and high school. I regret that it was all a mistake. And in an instant, I had a boyfriend, to her sister. Her sister brought her boyfriend to the house that was supposed to be just us. And then they hugged each other, right in front of me. Blood rushed to my head. In a frenzy, I attacked her sister. Maybe I was wrong, but it was too late.