He works for a major company and married his wife Mao a few years ago. Their life as a married couple is going smoothly, and this is what "happiness" really means. However, his junior colleague Zuo Ci, whom he dotes on, has a bad habit of indulging in womanizing despite being a grown man, so he invites him to his house for a dinner party as a way to share his happiness. In the midst of being drunk, he suggests "I'll let Mao have a simulated married experience" and disappears for about three hours... But from that day on, their relationship has become strangely distant...