-spoilers-
He is unique because of this he is used by everyone since birth because he has drug resistance his body refuses to take drug and get addicted by it he can tell difference between that no matter how much he is using he never gets addicted
recent chapter doctor and general was talking about some failed project where gov was experimenting drugs on children
I think that mc was part of that project so that is why his body refuses to get addicted on drugs can tell difference between them also his body only accept the drugs which helps him to recover
He never felt loved cared or any kind of kindness ever he was alone since he was child he was beaten malnourished and abused he is still being abused but now he is kept in hostage(idk if this is right word) by general most of the time he is naked at room where he is monitored by general and they have smex. I belive he likes general because he is first person who ever brought food for him or show any kind of affection even tho when they first met he beat him and force him to taste drugs to see his ability
I really dont care ab plot anymore i dont even know if general is corrupted or undercover (most likely undercover who works to take down drug organization) there is different war zones so its huge mess most of it i dont get
What i know is that boy is heavily abused used manipulated and never had a single good day in his life his dream is to pay his debt and star normal life to get a part time job
Spoilers from novel
The thing is it is actually his father who was experimented on and was part of a research project.His father who gave birth to him was a male and was the only 'successful case' as far as I remember.His father's unique anatomy which was a result of the experiments conducted on him was passed on to him naturally that is he was born with it.Also there only few flashbacks of his father's backstory but they are also pretty sad.

I feel so bad to him i am crying i dont even care about plot or anyone else
Fucking hate lab projects who gets treated worse