My girlfriend invited me over to her house while her parents were out. She asked me to stay overnight, so I knew tonight I would probably get to do what I had always been looking forward to. But just thinking about it made me feel anxious, not knowing if I would be good enough. To feel more confident, I took a male enhancement pill. Mitsuri is her older sister, and today she was home; this was also my first time meeting her. Mitsuri was not only beautiful but also had a stunning figure that I couldn't take my eyes off. That night, my girlfriend drank a lot and got drunk, and since I had taken the enhancement pill, I was feeling aroused with nowhere to relieve it. At that moment, Mitsuri approached me, deliberately inviting me. Despite feeling guilty towards my girlfriend, I couldn't resist such an alluring girl like her!