Zack and Zane are.."besties." They go to school together, have all the same classes with each other, live together, they do literally EVERYTHING together. It's like almost like they are the same person..
Mikasa and Eren attend the same private school. Sometimes boys and girls have to share the same room and this is one of the few times. Things start off rough, get better, and get rough again. But what relationship doesn't have its ups and downs