Due to our father's remarriage, a new stepsister suddenly appears in our lives. She's beautiful, has a great figure, and always carries a lovely scent, making every day filled with excitement and anticipation. Obsessed with her, I give in to my desires and take advantage of her while she's drunk. But then she wakes up, leaving me wondering how she'll react. Meanwhile, my older brother, also drawn in by her charm, gradually finds himself heading down the same path.