This kdrama is veeerrryyy fight club inspired i'd say. I definitely was NOT expecting that plotwist in the end, but thats what makes it all the more interesting i guess. This is also one of those kdramas that leave you with an open ending where you can only guess what happens in the end. I really like how they made us experience sort of a surreal experience along with the main character- And although the fandom loves to joke around how he and his killer alter ego are in love, it honestly does make a lot of sense. Was them being okay with each other in the end, them confessing their love for each other? LOL Im just blabbering around but the characters had more chemistry than the main character and his girlfriend!