My mother remarried and suddenly I, a high school student, had an older sister. She's gorgeous and beautiful, but she has a sharp personality! I guess it's the opposite of me... The moment we met was the worst, but as we lived together, I gradually became more comfortable with the charm I felt. She's bright and cute, and contrary to her flashy appearance, she's surprisingly pure...and before I knew it, I had fallen in love with her older sister, Hina. we are siblings