Having just moved into a new place, I fell head over heels for Hibiki, the beautiful woman living across from me. Captivated by her stunning looks, I secretly watched her through the window as she spent time with her boyfriend. She seemed to deliberately tease me, performing suggestive gestures and openly displaying intimate moments as if to seduce me from afar. One day, when she beckoned me over, I visited her apartment and was shocked when she suddenly asked me to be her sex practice partner. Surprised by her request, she quickly changed her demeanor, transforming completely into an aggressive seductress. This unexpected shift rapidly deepened our relationship, driving it into bold, uncharted territory.