He works for a major company and married his wife, Rei, a few years ago. Their married life is going smoothly; this is what you would call "happiness." His junior colleague, Yoshino, whom he dotes on, is a cynical virgin despite his age. Thinking he would share his happiness, he invited him to his home for a dinner party. Fueled by alcohol, he suggested that he let Yoshino have a simulated married life with Meika before leaving... But from that day on, their relationship became strangely distant...