"In a different ending for the senpai route, he (main protagonist) finds videos of the senpai nailing Sayaka and decides he's going to call her out for being a cheating whore. He waits until the they're at the wedding reception, then plays a video of her fucking the senpai and acting like a huge slut on a big screen in front of everyone, her parents, her friends, and all the other guests. Understandably, she freaks out and loses it trying to block everyone from seeing what's going on, then breaks down sobbingShe looks up at the profag and says something along the lines of, 'I can't believe you would do something so terrible to me.' To which our boy is like, 'Hope you have fun with your new life. Peace.' Then turns and walks the fuck up out."
Or other example with the bad ending of old teacher's round, main protagonist discovered he has been cuckolded by his wife and old teacher, he had bound the old teacher and hide him in closet then make love with his lover last time before reveal the whole truth.