My senior's girlfriend is someone everyone secretly admires. She's fair-skinned, busty, and super cute. On Friday night, I went to my senior's house, where I live with him, for a farewell hotpot party and drinks. While he was cleaning up, she sneaked a kiss when he wasn't looking. After that, she kissed me again while everyone was asleep. The next day, my senior went on a business trip. For the three days that he was away, I had sex with my senior's girlfriend. She said she was OK with raw sex, so I came inside her over and over. It was a dreamlike three days.