I didn't know much about happening bars, but I was just looking for some excitement, so I took Mayuki (my girlfriend) there, and that was a mistake. I didn't know the true nature of Mayuki, who was devoted, pure, and adored me, and always looked to see how I felt...or maybe I didn't want to know. Our sex had become monotonous and I was no longer satisfied, so I pretended to ask her out on a date, and tricked her into taking me to a happening bar. I thought I'd get some excitement from showing other men how I was having sex with my beautiful, well-built girlfriend, but then men came into the playroom without my permission and started having sex with Mayuki...isn't that against the rules? It wasn't supposed to be like this... I don't want to see Mayuki having sex with someone else. I apologized for deceiving her and said, "Let's go home now," but she said, "I'm not going home," and got angry... Why? Let's go home. Then, a man in his 50s who said he was an adult video actor came in and took Mayuki into the playroom... I don't want to see Mayuki feeling pleasure from being made to cum by that old man, even though she's never had an orgasm like that with me...! Shit shit shit shit shit!! Something inside Mayuki seemed to have exploded. She's a beautiful woman who rarely comes to sex clubs, so there's no way she wouldn't be popular. And after being pampered and having her need for approval satisfied, Mayuki realized that it was stupid to cling to a hopeless man like me... You brought me here because you wanted to see me like this, didn't you? You useless dick! All I could do was cry as I watched Mayuki playing with five men... No matter how much I begged her to let me cum inside her, which she stubbornly refused, and now she's making strangers do it... It's so frustrating! I want to kill her! While the woman I loved was being seduced, I, I... had an erection. My useless dick was erect...