Game of changing lovers into best friends

It hurts to see your crush having sex with another guy. Witnessing my crush having sex with another guy, I honestly don't understand the content of this sex movie. The students in this movie are really screwed up, having sex and letting their friends watch it with them, even recording a public video like that. I just felt miserable for the young man to see his crush being fucked by another guy, but he just dared to watch and swallow his saliva.