Responses
Right, it’s possible he’s working TOO much, that it makes his studying ability worse.. Kim suho seems to be the type who’s naturally quite smart and also hardworking so he gets far with that extremely packed schedule (￣∇￣")
Or maybe he's just the type to learn through experience instead of cramming information... after all, he didn't seem to have any troubles in his part-time jobs.
I don't think he's not working hard enough but sometimes working hard is worse for your improvement, especially in studying. If you don't even have enough sleep to not faint, how the HELL are you going to remember complex math equations(╯°Д °)╯╧╧