i totally get what you mean and i somewhat agree but i wouldn't call it regressing
i get what you mean. but remember, Hyo Un acted like this in our MC's past life too. He's pretty mature when he's talking to other ppl in the modern era. But, he's pretty child-like with our MC.
I would also like to add that Hyo Un wished to be an adult when he was like 13 (maybe younger, but he was still small) and grew overnight into a whole ass GROWN ass man lmaoooo. I truly believe he didn't mature emotionally that much. even in the 500 years he waited. That's my theory anyway...
hey guys dont attack me but i have mixed emotions about hyo un regressing after finding out that taehyuk was his soulmate or whatever like yes ik that he was standoffish at the beginning bc he was still mourning the love of his life and that he thought that taehyuk was just using him but even now i think that how he acts is too intense (DONT GET ME WRONG I AM NOT HATING) i just wish that they kept that manliness from the beginning