Danggit, I already wrote this, but didn't realize that the thread is for novels.
I'd have to say "Life is Fun" by TheOdd1Sout and Boyinaband. Life is Fun is about James (Theodd1sout) and Boyinaband arguing about the good and bad things in the world, and come up with the conclusion that you don't have to constantly think about all the negatives, and that you should have fun.
I think my comic is similar to this because most of my comics include two character's talking. One is not particularly happy or sad, but the other one (my OC) makes the jokes and tries to lighten things up. Sometimes I don't do the two character's talking, and right now I'm working on a comic that includes a different person, because I want my characters to have some kind of memory of the previous comics, and my OC isn't lighting anything up in this one.
https://tapas.io/series/Discounted-Comics if you want to read it