After 12 years of marriage to my wife Mari, our life was smooth and fulfilling—until our boss, Igarashi, inserted himself into our world and shattered our everyday routine. Yet, this incident also became a turning point for me, revealing a hidden side of myself, and deep down, I'm grateful for it. It all started when Igarashi covered up a mistake I made at work, and we invited him to our home as a gesture of thanks. Under orders from his superior, Igarashi lured Mari into attending a pornographic film, and we ended up going to the theater together as a trio. From that day on, our lives changed completely.