Spoilers

Some Spoilers ..IF you want to read.

Spoilers
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If you want some spoilers.It ended at S2 with 62 chapters.Still S3.
*Hajun always thinks of his Friend as the Friend he meet when he was young,he met a boy when he was young and kinda fall in love with him" a crush actually" but the day when little Sihyeon was leaving the place he lived."his mom was always going into news places every while that's why he was crying when he meets little Hajun" he goes that day into an accident with little Hajun and Hajun doesn`t remember anything expect he"thought" that he has a wound on his wrist and doesn`t remember his face but only his name was YongJae.

* Hajun didn`t find that little boy until he meet another Yongjae in high school with his wrist wound and thought he was him. he liked him Believing he was the real Sihyeon, that`s how they were friends.

*He wanted to try having sex with some men but can`t do it until Sihyeon meet him that`s why he was inexperienced at first with him.he wanted to know if he can actually hold a man.

*That happened in S2 "Which is the flashback of little Hajun and Sihyeon meeting and also meeting with his blonde prof friend. while in season 1 the story was about is how Hajun is slowly falling in love with him and Sihyeon slowly opens to him , So S1 ends at chapter 29 with them being slowly falling in love with each other.

*S2 is where they started to date and Hajun attitude will change a lot towards him. More gentle, more lovey dovey and the way he looked to him.
*Hajun in S2 there will be a time when he was comforting his friend Yongjae .he hugs him and saying to himself "gladly i don`t feel anything towards him anymore" That time Hajun didn`t know yet that the real kid was Sihyeon but still the blonde and he was already in love with Sihyeon.
Sihyeon saw that and thinks that he still love that blonde.He was so jealous.at the same time Hajun too was too jealous of him thinking that he was close to Prof Uno.he thinks that they dated before when they didn`t. some things happened between them cuz of jealousy "the fought" and then Hajun told the Blonde he was Dating him.

*that time Sihyeon meet Uno prof. got drunk and Uno bought him to Hajun House, Hajun Saw that his name was another one, that`s when he began his Suspections of him, around ch40-50 maybe.

~Uno acutally have a crush on sihyeon and tried to do it with some men who looked like him.

*Anyway Hajun will go into another accident and finally remembering little Sihyeon Face , but he wasn`t sure until he put the t-shirt on Sihyeon`s face as the same to what happened when they were young and then he was sure that he was the real kid."Sihyeon"

~uno was the reason Hajun was in the accident as he tried to kill him and shot him.

*S2 ended at Sihyeon leaving Hajun when Hajun heard him talking in the phone as he was discovered as an agent , He was orded to kill Hajun but he chose to broke up with him to protect him,Sihyeon attacked him ,leaving him Unconscious,kissed him and run away with a crying face.i think here Sihyeon found that he really loves him.

*Hajun tried to look for him for a long time and a lot of time has passed by so he deiced to resign from his job to search for him abroad.

* in S3 the author said that in the last Season Hajun will meet the agent Sihyeon and face each other, but didn`t put any date to that.maybe this summer.

* There`s a lot happened more than this.but this is only short summaries. the story is actually very good and Hajun is more a responsible and nice guy more than he seems and he can have his heart for only one person for along time.