Responses
While I do agree, i think the background of him working in and being a fan fashion/modelling (an industry that values that ‘look’) could explain why he had maintained such a figure alongside him working/overworking when making his way up (perhaps he forgets to eat). Note these are merely headcannon based on what we know

why is the mc so malnourished? am i the only one that finds it off putting to see the outline of mc's ribs? his bones look too fragile