
OG ending is actually that Jaewoo and Hyeonjin start up their restaurant, but Mujin gets pissed since Hyeonjin is so happy (Mujin doesn't know Jaewoo is back, he still thinks that Jaewoo is dead) so Mujin gets a construction crew to come and destroy the restaurant. Right before they start demolishing it, Jaewoo stops Mujin and tells Mujin that he is the real Jaewoo, and Mujin obviously doesn't believe him. So, Jaewoo exposes all of his memories with Mujin to Mujin, and Mujin realizes it really is Jaewoo. Mujin finally then leaves for good, never to return or bother them both ever again.
back on my 400th reread and it still baffles me how they switched the ending for the manhwa... its a happier ending imo but wayyyy more rushed especially the last chapter....