EXACTLYY
my theory is that hes stuck in the mask that lee dohan was wearing or the dokkaebi who possessed lee dohan when he goes violent, considering dohans eyes go red when hes violent and him having red eyes too, and the fact that dohans mom was sure that a dokkaebi was possessing dohan and the man who appeared on ch. 0(?) was mentioned to be a dokkaebi
just a theory though ╮(￣▽￣)╭
OH and that part when dohan was wearing the mask and saying something that involved hide and seek and dokkaebi who appeared on ch. 0 was counting to 0 to 100 and we count to 100 when playing hide and seek. there might be a chance of the mcs grandfather being the dokkaebis teacher/master
But where’s the hotty with the long hair and red eyes