I'm Banging My Rival in a Parallel World!?

This has 4 stories in total, not related to each other. The first one is the main one, about a guy who goes to a parallel world and there he and his 'rival' are in a relationship. When he comes back to his world, his feelings for his 'rival' have changed. The second story is about a guy who has a voice fetish that meets another one that doesn't like to talk because he's insecure about his voice. The third one is about 2 best friends, where one is in love with the other but the other doesn't know. That guy is after a girl and the otherhelps him, despite being in love with him. The fourth one is about a guy with a chubby fetish or something that meets a chubby guy and basically assaults him in the back of the bar where he works. That's literally it. This one is the worst. The other ones at least were consensual, they had a lot of issues but at least were consensual. The main story is kinda cute and funny. The 2nd and 3rd are nothing special but yeah, it's just one chapter for each so you might as well read them while you're at it. And just skip the 4th story. Don't waste your time with it. (review written in 2020)