Sappy mushy clingy hyoun was always his true personality though. Toward s1 end, hyoun was already sappy mushy and clingy and this is before he regain his memories. He was meant to become like this eventually, it was only a matter of time. Tsundere hyoun was someone who distrusted taehyuk and it was meant to be a temporary behavior.
I'm rereading this currently and hyoun from the beginning was someone who was lonely, scared, did not trust anyone, and was always on edge, that was why he was acting like a tsundere. But once he learned to trust taehyuk, his true personality came back. I'd say that's a pretty good development.
I understand if you dont like this version of hyoun, but I just hope you understand why he is sappy mushy and clingy, and don't view it as some character assassination attempt.
I understand that this is just his real personality and him being happy but it also remains me in the flashback that he was just a kid/ just a dragon who knew nothing about how the world actually works making him equivalent to a child, and it doesn't make it better that he has the body of a grown man and is fucking with said body while still mentally being a child. So him acting that way now is kinda strange for me, it's just a personal preference (-3-)
PERIODTTT
This might be an unpopular opinion but I don't rly like Sappy,mushy, clingy, hyo-un. Like I kinda miss tsundere version of him before he remembered that taehyuk was his past mate ┗( T﹏T )┛