I've had a close older brother figure since school days. He brought his girlfriend (Aika) home to visit, and I knew they were having sex together in the next room. Aika was cute, charming, and had big breasts—truly an attractive woman. I couldn't help but envy my brother. One day, he told me he'd be coming to town for a business trip and asked to stay over. When I reunited with Aika after so long, she was waiting there, defenseless and completely unaware. My heart raced, filled with excitement and confusion. My brother was stuck working late again, and they'd been in a sexless relationship for a while. It seemed such a waste—such a desirable woman, waiting so vulnerably. Overcome by impulse, I pinned her down, and the sexually frustrated Aika...