One day, I visited my friend's house and instantly fell in love with his older sister, Erena, who was cleaning by the entrance. She had a gentle and calm presence, and her soft, prominent big breasts made her the perfect woman in my eyes. Later, Erena joined us for a card game with my friend, but I couldn't focus on playing—I could only keep staring at her. When my friend eventually left the room, I could no longer hold back and moved closer to Erena. I knew it was wrong, but I could feel her pulling me in, as if drawn together by some irresistible force.