i feel like she( grandma) just raised jiwoon for the sake of the company and probably think at a young age he (jiwoon) already know a lot of things and knows what to do. we can really tell how jiwoon does what he wants without putting much thought to his action. no one taught jiwoon what's good and what's bad when growing up that's why he turned out like this ;-;
ahhhhh they're so cutee