I already hear the wedding bells!
Especially since Yohan really likes him, too! I know Yohan likes Hyunwoo more than than just as a superfan! (≧∀≦)
The time in the Abyss probably passes faster than the one outside due to corruption but awakened people like Hyunwoo don't physically age in comparison to the decades they spent inside the Abyss? Except they just get white hair?
Anyway, this is my hypothesis. (●'◡'●)ﾉ
My guess is that corruption is what’s stopping Hyunwoo from aging. What I’m currently wondering is how he’s been able to keep an appearance similar to his uncorrupted one and also keep his sanity sometimes unlike everything else in the abyss. My current theory is his corruption can be seen more internally like his organs, bones, and everything else inside the body are very irregular and his brain is the last thing that’s not fully corrupted yet
"It seems like my corrupted self really likes you."
So you're saying that your corrupted self, who more or less follows their primal instincts for the most part...Likes Yohan? My guy, that's practically a confession