Is there even a Klaus route? He seems like a cool character!! Theres only little he says when he appears throughout the routes for the main characters but I would like to find out more about him.
There is, actually! In order to get it, (in my experience, not sure if theres another way) you have to get Rune's jacket and follow Klaus into the woods. After that, go down Devon's route until you get to offer to help him put away the telescopes. Choose to go to the cafeteria instead and you'll be on Klaus's route.