MC is the orphan who grew up in an orphanage. He is handsome to the point that kids around him call him pretty, but at the same time is very aloof and quiet. His teenage years were neither miserable nor great; he got his share of bullying, but whenever it happened, he tried to fight back whenever someone tried to raise a hand on him.

ML is a kid with an estranged family; his father pays for everything, but their relationship is as good as dead. This whole family situation leads to ML making his own choices in life, which might not be right, but eventually, he joins a gang. This alone will eventually influence the MC and ML relationship and story.

Those two are not perfect individuals, nor do they have perfect backgrounds or bright futures, but what anchors them is that they had each other in the whole world. But what story without some drama... there will be a time skip and both MC and ML will have a problem recognising each other.

So MC and ML become friends and after the MC graduates the ML takes him on a trip with him as a tag along with his gang who is doing some sort of mission in a beach town. There the ML basically works up the MC little by little until they are not just besties but humping like rabbits. FYI when the MC learned he was an Omega because it was a late manifestation the doctors told him he is basically infertile - but of course he didn't stay that way. The ML is clearly madly in love with the MC and the MC is clearly a softie towards the ML but because they don't know that this is love and the ML is very rough around the edges he says things that it is preferable that they are f*ck buddies to him dating others and knocking people up. So of course when the MC finds out he is pregnant he takes that one basic statement even though the ML with his action is always taking care of him and worried about him and runs away. Skip to 5 years later and the MC is living a difficult life with a debt to a gang that basically want to make him a prostitute. The MC reunites by chance with the ML but they don't realize they know each other because the ML is known by a different name Yoon Donhwang and certain small identifiers are different. Well that is because the ML had a tragic accident after MC fled where he had to get some reconstructive surgery and also where he lost his memory. But the ML even under this different ID and with no memory still is naturally trying to take care of the MC and ends up liking him. The ML even does a background check on the MC and discovers they were childhood friends and they were together. Now it appears the ML was heavily traumatized by the accident because he doesn't want to live his original identity but instead of saying any of this and being like hey your suspicions are correct I'm actually Gu Wanjae he doesn't and instead ends up in this somewhat coercive but also supportive relationship with the MC and is constantly upset about the fact that the MC loves Gu Wanjae and had a child with him; when it is freaking him! It's almost like a dual-personality issue. So much of this conflict could have just been fixed by the ML disclosing his past and explaining he doesn't remember anything but also the MC answering some of the MLs questions instead of always closing up (mind you I know this is a self defense mechanism). Well while they are together the ML starts having recurring headaches and ends up in the hospital and basically begins to recover his memories but by this time it's too late to resolve this softly. Some horrible assault happens to the MC by that gang that wants to force MC into prostitution and he ends up in the hospital. This time the MC has lost his ability to speak and though he has surgery to fix that it is a long recovery. ML basically obliterates this other gang with his gang but uses up a lot of his resources to do so and gives all his remaining assets to MC as a way to take responsibility for their child and what he feels drove the MC to this situation. So instead of telling him he has regained his memories etc. He tries to stay away from him and contrives it to look like Yoon Donhwang, who is him, has died. The MC hires an investigator who ends up confirming that the Gu Wanjae the ML, and Yoon Donhwang are the same person and the reason why there are small differences in identifiers is because of surgery due to the accident the ML had which resulted in him losing his memory. But get this, even after learning all this the MC and ML still don't have a decent conversation about all this instead the MC manages to get with the ML by calling him Gu and that is enough for the ML to realize the MC has accepted both versions of himself. Though even this is unclear. They then finally have a happy ending but man all this could have been resolved and possibly avoided by talking to each other.