This show attempts and maybe even succeeds at traumatising its viewers. The genre of this show is not realistic romance but rather psychological horror disguised as a slice of life!

The male lead Hyun Oh is a psychopath. He likes to control Eunho and he is mentally abusing Eunho no matter whether he knows this or not. He does not respect her and treat her like a person because his mom abandoned him and uses it as an excuse to not be attached in a relationship because she may leave her. He also gets back with her not because he loves her but out of jealousy and does not trust her when she goes out on last date with Ju Yeon.

The female lead Eun Ho is acting like a sociopath, she is entirely dependent on Hyun Oh for even cooking, cleaning, etc. She has no self respect for herself. Her sister disappeared years ago. She has forgotten her sister and moved on with her life but when Hyun Oh does not reciprocate or understand her emotions, she pretends to be alright. She is also possessive and Hyun Oh is controlling her. She is easily convinced. She becomes crippled without him and becomes functionally impaired.

Ju Yeon is similar to Eun Ho because his brother disappeared and he is going through sorrow.
Hye Yeon offers herself to sleep with anyone. Much is not said about her except she likes Ju Yeon and she has hidden worries which is not revealed.

This show is about only one word 'HAPPINESS' or maybe another word 'TRAUMA'.
Every characher is selfish in this show. It has been attempted to portray it as self preservation efforts.
Even though the viewer pities the characters, it is frustrating to see no character development. They are all stuck in their past and force themselves to be happy. This show is not about characters progressing and learning from their mistakes but rather pretend that nothing ever happened.

Hyun Oh is possessive and Eun Ho interprets it as love. Hyeri is kind and Ju Yeon interprets it as love.

Female lead thinks love can cure everything, heal traumas, and is the ultimate source of happiness. It can even erase the past. It can solve all her problems. And for her that love is Hyun Oh and she can't give him up. And when he is gone, she creates Hyeri so that she can be happy. Hyeri is a manic pixie dream girl.

There is no other show where all the four leads are obsessed with being happy. At some point the viewer could care less about the show. The cliffhangers are there to torture the viewers that one will wonder when will this pain or show will end.

The show is sadistic towards its viewers. It makes people hate god, universe, etc. It is filled with negativity. The show makes viewers akin to Ju Yeon. It makes us hate our emotions. Similar to EunHo. It equates selfishness with self preservation.

It makes the world seem cruel and it makes us desperately want the characters to be happy and it defeats our hope that things would get better soon.

All the main characters are bad. Except for Hyeri's Friend and Eunho's Senior. All others are abnormal or having mental instability. And those two characters do not have enough screen time. They barely make the show watchable.

In this show, most leads do not have a family, they have lost their family members either death or they have gone missing. There is masonic? sun? field? one eye? satanic? jinn possession? symbolism everywhere which also a viewer is expected to crack their head on. How the poster repeatedly shown in the office says open the door to the new world? new world order? references to monarch mind control programming? The show seems to be made by asking ai or search engine, all the previous shows on dissociative identity disorder and mixing it into a melting pot. The show is inconsistent and makes one wonder what just happened. If you are addicted to dramas then definitely try this one, it will make you hate all the dramas and even life.

This show is not a healing drama. One would be better off watching a documentary on Dissociative Identity Disorder or read any book on any subject matter. All shows are somehow a waste of time but this one would leave you with disappointment.

This show is also about grooming. Hyunoh grooms Eunho and Hyeri grooms Juyeon. Characters who are starving for affection are ready to do anything for it. Especially Eunho and Juyeon. They are attracted to the other person. They are also ready to sacrifice everything. They both believe that this behaviour is love rather than clinging. And they need love to stay alive. In case of Eunho it is creepy fixation, she misses Hyunoh's smell, voice, face,fingers and toenails. She seems to like his features more than his character and thinks no one can understand him better than her because they both are orphans. they both treat each other like their prized possession rather than as human beings. Most of the characters are shallow, interested in others for their gain and benefit which includes company and trauma bonding.

Hyunoh is a overt narcissist and Eunho is a covert narcissist. All symptoms from all disorders are sprinkled here and there so as to confuse the viewer and gain sympathy or empathy so that we would watch the next episode. Attachment disorders are used to justify their actions. And if we do not accept the narrative, it kind of tricks the viewer into making us think that we are lacking and we are the ones at fault for not sympathising or empathising with their situation.

All main characters loath themselves and probably their existence. They all are unhappy because they are not moving on. They can help others like children who have gone through even more pains and suffering. They can choose to make this world a better place. They can work for noble causes and help humanity. But they all simply want love, love and love. Cry over their trauma and ask others to understand their worries without ever sharing it.

There is war going on. Many people have lost everything. Compared to other serious issues on this planet this drama tries to be imply that the lives of the four leads are serious than everything on this planet. To put it simply all four leads want some person to revolve around them and they want attention from this one person and they want to give everything up for this one person. And when things don't go their way, they are upset.

The last episode has male lead and female lead have a happy ending. She seems to have learned to control him. Pain brings you happiness was emphasised rather than trying to see where the pain came from and accept it and find solutions. Pain does not always bring gain. And saying pain is like jewel is nonsense. Pain is something we should not be proud or ashamed of. But in the end the sudden happy ending is ridiculous. It would feel eerie if they had used different colour filters. But they won't, they want to make good things look bad and bad things look good. Order out of chaos.

This shows makes me wonder whether viewers have become a part of a mind control experiment? Is it supposed to make us lose our sanity? Does it attempt to make us dissociate? The scenes where the eyes and face are distorted may make a person dizzy or have a headache. Whatever it is this show has been filmed and aired. And it is left for the viewers to make sense of it.