It's clearly that they like each other (yahwi and jooin) and will be the end game. CAIN HE DESERVE SOMEONE BETTER DAMN.
If I remember the author said, season 1 focused on yahwi and jooin. Season 2 will be Cain and jooin. Season 3 yahwi and jooin. SOOOO I THINK THE ENDING OF CAIN WILL BE LIKE THE ENDING OF TAKU IN LOVE OR HATE MANHWA.
DAMN, JAEWOO IS THE BITCH FR. I'M ROOTING FOR REAL SEOWOO , GO MY SON!!!