This review may contain spoilers. I can handle the truth.
A rewatch made me realize that this is one of the best pieces of art I have ever seen.
Let me start with the line "Yes I envy him" Yūsuka says it in a play followed by a moment of silence. Momentarily he zoned to his life and the younger man that slept with his wife.
Yūsuka never confronted his wife about cheating. Instead, he tried to do the exact sex position with her as the one he caught her…