First of all, bulimia is an eating disorder that INCLUDES vomiting or consuming laxatives as a way to get rid of the food eaten. It SOMETIMES includes obesity, but not always.
Secondly, they made him look like an abnormally huge guy with his *cough* "towering 185cm height"... I mean, yes, maybe in S. Korea 185cm is a lot, but he is not as huge as the artist depicted him in the art (like, his buff friend looks tiny compared to him). (ffs I'm 179cm tall and I'm a girl, and I'm not even that unusually tall in my country, I know girls who are even taller). 😂