One day while working overtime, I couldn't go home because of the heavy rain, so Karen senpai decided to let me stay the night. When we were alone, I lost all sense of reason when I saw her wet, see-through body up close! Even though I have a girlfriend... but the body of my senior that I've always admired is too sexy! There's no way I can resist such a temptation! I don't care what happens, I just want to cum! I devoured her soft, big breasts with gusto, and had creampie sex with her in the living room, in the bath, and over and over again until the morning came! This is the record of the immoral sex between the two of us, who ignored her calls and kept doing it until she went to work...