I went on a graduation trip with three friends, a boy and a girl. I decided to confess my feelings to Riho, whom I've always liked, and my friends should support me… But I lacked the courage and could only agonize over it. From another room came sweet sounds and noises. There… Riho was there, having a night raid. "I liked her first, how could I…" If only I had confessed then! Regret and hatred welled up inside me, but my friends and Riho were passionately pleasuring each other. Even knowing they would be discovered, when our eyes met, she pretended not to see me, making love intensely and panting heavily. Liking her was a mistake.