@Abormel not a spoiler, it was explicitly revealed a few chaps ago, his parents are just insane. they have huge expectations of him, they're not even against him dating actually but the catch is that it's only allowed as long as he's number 1 at everything. they also want him to go to a top uni and i think also a national athelete? i guess his parents, since they're rich and powerful, would cause problems for jayu? but basically he's worried he'll end up neglecting her as she waits for him and he wants her to live a fulfilling life even as he's tied down