
I didn't said I don't like him but he is my less favorite in that story. All of them have flaws and made mistakes but Haesoo did the most.
Yeah his mom criticized him but she did the same to Joowon (even Joowon said it that he is the less favorite in her eyes when he really wanted her attention and affection) and sorry but his mom behavior in that situation is normal. She was shocked not only she finds out they are gay but she caught them doing it, for God sake they are teenagers and step siblings what do you expect? She was super calm because if that was reality they probably will have been beaten or kicked out of the house..
Joowon did wrong telling Haesoo's mom that they were just joking around but he was scared and just a teenager but Haesoo took it so hard that he started mocking Joowon's feelings and provoking him all the time. And I can forgive him for that because both are just teens.
But man Haesoo didn't change as an grow up adult he still mocked Joowon's affection by sleeping around before and after Joowon's visits, showering him with lies and and not communicating at all. Joowon was to scared to tell him that he loved him because he is afraid that Haesoo has not the same feelings for him.
Then did I said Taku has not wrongs doings either?
Taku is manipulative and he forced himself in that relationship but he is honest and he admitted that to Haesoo, he even admitted that he us petty and not as good person as Haesoo think. But because of Taku Haesoo started having some self respect and stopped sleeping around with random people. Haesoo even tried to commit in the relationship something new for him. And they way Taku showed his affection and his interest towards Haesoo was something new to him so that brought out his lingering feelings for Joowon.
Haesoo for me need some a lone time because he is jumping from one relationship to another.. he need ti grow as a healthy person to start love and respect himself more and then to commit in a relationship.
That is just my opinion..
Honestly I was expecting more from the author not the cliche "car accident and puff i realized that I can't live without him" I will love to see them taking different ways and a couple of years later they meet again (being Joowon or Taku doesn't really matters to me) and from then on having a new start..

I am not gonna talk about the parents anymore because we don't have a clean point of view from them, but in general their approach where 10 times better than reality (because my best friend is going through hell now that he came out to his parents)
I said he brought that to himself with his behavior.. Joowon is wrong of course too but when Haesoo is behaving like a slut(sorry for the language, but if you remember when he first slept with Taku he was provoking him too) don't except from the others to respect you and your body when first you are giving them the right to do so. When Joowon finish inside him I really cheered When Haesoo slapped him because he deserved but when he forced him in the car Haesoo just did it and later went at Takus office because he was frustrated but he ended up crying. Haesoo always put up with Joowon visits without putting some boundaries giving Joowons the right to act as he want.
From personal experience when I am forcing myself to please the other then the other one will be more rough and will step on you because you allowing them but when you send up for yourself then you are receiving the respect that you deserve..
Being in a relationship is taught and those two are not even in a relationship that is mostly f@cking buddies than a couple..
Don't get me wrong I understand from where he is coming but from my point of view (and I am not telling I am right, every person compromise differently any kind of stories) but Haesoo as an adult, had the option to choose better for himself.
Nobody forced him to sleep around he choose that way to fill the emptiness in his life.
Nobody told him to lie and mock others but he did that to protect himself from getting hurt.
And nobody obviously pushes him to stay in a toxic relationships with Joowon when he had the option to end things from the very moment Joowon said they are just joking or later on when he had realized that both of them are being hurt from that situation but he continued..
Is not that I don't like him is that he made the most wrong choices to me.. even when he accepted Takus offer he shouldn't but he let it slide again (and don't tell me he did it only for Takus sake because I will never agree to be in a relationship for somebodys sake )
He hasn't cleared his feelings but here he is putting himself again down choosing to go with it.
That is why I said he brought it to himself because he can't find the courage to stay alone he is empty that he need that affection and attention from his surroundings..
BTW sorry for my English is not my first language
honestly i hate this story but im so invested, and ik taku doesn't end up with heasoo and that made me mad at first but when i think ab it i never really liked heasoo from the beginning