
While I do agree with the plot hole sentiments, the cycle and process of abuse is very complex. I think it’s extremely realistic in the way the author portrayed sooin going through this abuse. Abusers often isolate and make their victims completely dependent on them. They also make them be in immense fear. It makes sense why Sooin wouldn’t reach out to any family. It takes an average 7 times for a person to finally leave their abuser and in Sooin’s case, the abuse he was going through was severe and horrifying. As for why Sooin immediately falls for chi-hwan I think that’s also realistic. Sooin has become dependent on someone out of fear for years now. Then it’s like his rescuer and hero arrives and saves him from the hell he was living in. If it werent for chi-hwan he probably wouldn’t have ever made it out of that relationship. It makes sense why he would fall for chi-hwan so quickly. Especially if this is the first bit of affection and care he has gotten in years.

The story does actually explain a lot of those concepts though? And it's fantasy, fantasy is never, and can never, be fully explained. A Link cannot die on their own because their life force is tied to their vampire. If the vampire is alive, then so are they. His blood is poison because it weakens then vampire to the point until they simply become human again. It's a cute that can easily be viewed as a poison because it makes them wholely mortal again.
Joo's power is never fully explained but in the after story it is heavily implied that only one person may be able to use it at a time.
People who are abused usually can't or won't reach out for help. That's what makes them able to be abused and manipulated. And then it's kinda hard to show up afterwards while your apparent best friend is now MIA and you've turned into a vampire.
Sooin is weak because he's never eaten vampire hearts. He's stronger than a human but he's still just a typical vampire. He's not super charged like either of the other two main vampires. And as far as we know, he has never had any training or experience in fighting. Of course he's dog shit in a fight.
And a lot of people have issues with how quickly they fell in love, but it started off of both being unhealthily co-dependant on each other. And months passed by (which people seem to have missed) before they start falling in love with each other. Which still isn't clean and healthy love because of how it started and their own personal traumas. It takes until the very end of the after stories for their relationship to begin to be truly healthy. I'm not even upset with them fucking just after the murder because Sooin is probably feeling utterly euphoric and MC couldn't give 2shits about murdering someone. Is it a bit morbid? Sure. Do I think it's unrealistic or unreasonable? No not really.
3/5 Stars — Honest Review (my personal opinion)
The story jumps right into action and „forces“ you to empathize with Sooin, since he‘s in an abusive relationship with the most stereotypical scumbag of a human being and seemingly can’t escape from him. In comes Chi-Hwan, the knight in shining amor, who kills Sooins (seemingly) only problem in the world and also needs him and, conveniently enough, also falls for him; their relationship unfolds.
Don‘t get me wrong, I like a hot blood-sucker as much as the next gal, but they fall „in love“ so quickly and get obsessed over each other, you can’t even blink!
While it’s only human to wish better for Sooin, it’s still strange to literally jump onto another one‘s d*ck, as soon as your everyday and yearlong abuser is literally lying dead next to you xD“
Even if you overlook that grotesque interaction (and in general too much smut, without any real sensuality and build up to it), what bothered me most, was the fact that almost nothing gets really explained:
Why couldn’t Chi-Hwan drink anyone’s blood, but could survive on other vampires hearts?
How come a Link (who is HUMAN) can regrow any organ (even the heart), but a VAMPIRE dies, with his heart getting ripped out?
What exactly does make Sooins blood „pure“? What even does that mean? And why is that poisonous for vampires? How come Chi-Hwan, who is a vampire for hundreds of years, does not know that, but his Link does?
Even if it’s poisonous, why did it not kill him, but made him a human again xD?
What was that Magic/Power Joohyung (Chi-Hwans Link) possessed and how did he gain it?
How come no one of Sooins family ever reaches out to him? Or he to them? While I get that Sungha (his abuser) was blackmailing him with indiscriminating pictures and videos, Sooin did not really have any shown connection to the outward world to begin with, so he still could‘ve reached out for help and, I don’t know, maybe move back to his mother?
Why the heck would a Link get „stuck“ for eternity with the immediate state their body was in, when they became a Link (interesting concept, but still does not make ANY sense at all)?
And don’t even get me started on the whole switch! Why is Sooin physically still so weak, even after becoming a Vampire? Why even the whole „Sunghas blood and therefore his memories are inside me“-Arch?
The author just conveniently leaves everything very vague and takes whatever they need for the story to push forward and pulls on our emotions and heartstrings. ┑( ̄Д  ̄)┍
I think the plot per se had a lot of potential, but the author sadly was not able to properly develop a deep and authentic world, characters and connections (with explainable logic), which ultimately makes it a Porn with a so-so Plot.
It is an okay read, but I will definitely not read it again, since it leaves me with too many questions and (especially towards the end) bitter taste in my mouth.