Because Minho had trained for longer than Key, he was a ‘sunbae’ to him. Key didn’t understand this relationship and often found Minho telling him to do things irritating. One day they fought so seriously that people around them had to stop them. As a result, they became awkward with each other for two years, even after their debut. But since they lived and practiced together and were in the same group, they got to know each other better. Now the members don’t fight with each other at all :) (or so they say!).