This what soap opera would be like if they decided they wanted to join the psychological genre. Starts of typical enough main character has amnesia meets people that arent what they claim to be and the mind game begin. Okay,thing is somewhere along the way author got confused themselves. The plot twists follow no plan what so ever. It is all over the place. The characters personalities are in some permanent state of being bipolor. Best ex. Is the main character himself which you probably see best in the flashback arc.
Somebody might say well those are the traits of a psychological story, yeah true but that doesn't mean you write any nonsenscial plot that makes no sense, and think your clever by slapping a psychological tag on it. Doesn't help that you feel zero empathy for these characters who are increasigly amoral as the story progress, and hope they just kill themselves and get it over with.
In the end all the people who wrote a rave reviews for this, please do yourself a favor read an actual good work (idk ex. Shutter island). Notice the difference and then pray you lose your memory of the manwha.