After he entered the workforce, Momo and I met through a friend and got married after two years of dating. One day, Momo tells him she's going to a college reunion. It's a frivolous club gathering with things like BBQs and snowboarding, something the current, elegant Momo would never imagine. After some time passes, she receives a video of the after-party, and there's a man who seems to be her ex-boyfriend who seems to be quite close to her... "I'll be home at 10!" He waits, believing Momo's drunk words, but after that video, he stops contacting her. His anxiety grows and he has a bad feeling: Could it be with that man? No, it can't be...