My girlfriend was taking a nap. Suddenly, I noticed her smartphone next to me. We'd been dating for three years, and I'd never looked at her phone before. But then I had a premonition and decided to check it for the first time. The photo folder was filled with graduation photos, photos from dates, and countless other memories... What's this? There were photos and videos I didn't recognize. What's going on? She's sucking a stranger's dick. When was this video from? It must have been filmed fairly recently. The pure, gentle girl I knew wasn't in the video. There was a completely different, lustful woman, lusting and lusting, driven by instinct. Why? On another day, I looked at her phone while she was asleep. The video had been updated. She looked incredibly pleasurable as she was roughly fucked during a masochistic play. It was frustrating... but watching her being cuckolded made me aroused, and before I knew it, I was stroking. Watching her being cuckolded excited me, and my brain and penis were flowing uncontrollably. My perverted sexual desires had been awakened. However, she noticed, and when I went to check my phone as usual while she was pretending to be asleep, I found it. Is this the end of my three years with her? No, it's just the beginning. She says she loves me, but she just can't forget the dick of the man she cheated on me with. I just want to keep loving her. If that's the case, then show me how you get cuckolded by me... That's where our strange relationship began, and I secretly watch her climaxing like crazy while being cuckolded on live call, and it makes me depressed... It feels so good! *This is an NTR drama in which the supply and demand of the sexual proclivities of a girlfriend who wants to cheat and a boyfriend who has developed a desire to be cuckolded perfectly match.