In my student days, my brother would bring his girlfriend (Aika) over to our parents' house and have sex in the next room. She was cute, charming, and had big breasts...I was jealous of my brother for having such a great girlfriend. When I told her I was coming to Tokyo on a business trip, she agreed to let me stay over. When we met again after a long time, Aika looked defenseless and unguarded without a bra, which made my heart pound and I was confused. My brother comes home late because of overtime work, so we don't have sex...It's such a shame to have such a charming girl! I impulsively pushed her down and Aika was frustrated...