What if hwashim is actually kangjin or some sort of his soul is inside hwashim. Since the author doesn't really explain what's Gaia Shadow is. Maybe kangjin went to the black portal to sacrifice himself then his soul get reincarnated inside hwashim. I know it sounds weird but the way the other S-class and the higher up believe he's chaeyeon soo (or someone with the same strength) kinda telling something. When Yeonsoo himself believe he's just C-class.
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List here mainly includes the mangas where uke/seme had previous heart-break,unrequited love ,Broken souls- aka the character who lost their will & other past trauma...which gets better after meeting their MR Right
-where feelings remains unrequited
-where new lover comes
-where they ends up with the person they loved first
- Past trauma
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