that was a concept - they kinda made fun of him, saying he should relax during games (not be as competitive) and they just started calling him "relax" during this whole video :)))
I think all the members are really kind and helpful to Yuku when it comes to the learning korean and stuff, also Yuku was really helpful and patient with the members when they were learning some sentence in japanese
I’m not joking! E-Chan and D1 actually look like a married couple aka parents! Changmin is the mom and Dongil is the dad! They both are so protective and supportive to other people