
I was looking through the comments and people are discussing about the purpose of the book. I think we should consider the fact that the book is in a third person perspective. "They lived happily ever after." in a third person perspective. Sangjin could still be holding true feelings for Songwoo in the "happily ever after" ending. -it's the perspective of someone not involved in the character's life, someone observing from the sidelines seeing Songwoo as just a friend(side character)
I don't think the book is pushing Songwoo and Sangjin together (as I read in other comments about how they should've been able to confess to each other already). In one of the flashbacks, we see the red book. I think this is another red book, like there are multiple fates. Think of it like a game, there are checkpoints where your decision sways the future, which means Songwoo giving her advice at that point was a "checkpoint" that could lead their fate into another path.

Not saying this is what the story actually is, it's what I would like to think it is... or just my take on it.
At the end, Jesse never really went back to reality. At the beginning, Law pushed Jesse off and after that the situation restarted again. Throughout the story Law keeps saying that it's getting close and this time it will finally work. Before the point in the story where Jesse seemed to returned to reality, Law pushed him off the balcony. If I relate this to the beginning where Law pushed Jesse, then this is a symbol of restarting the scenario. Considering that the intention is to make Jesse forget the trauma, that is, the kidnapping and terrorist attacks; at the end Law convinced Jesse that it was something made up by him. This would mean that they successfully overwritten Jesse's memory, ridding of the trauma.
This interpretation probably developed from the bias I had while reading the story. Throughout the story I trusted Law and had the belief that everything he's doing is to fulfill Jesse's wish. They say it in chapter 52, the intention was not for Law to be wanting to control Jesse, or be of equal ground with him. If __ to the point that Jesse fell off the balcony is the timeline for Moritat, we see that even though Law is "controlling" Jesse, he's still submitting. I mean, in the supposed timeline for Moritat, Jesse was attached to Law due to Law's submission and need. If Law wanted to be on equal grounds, he wouldn't stop Jesse from leaving.
Chapter 52 does however, imply that Law wanted to be chosen by Jesse. This would mean that Moritat was a way of manipulating and increasing Jesse's dependence on Law. It doesn't seem like a good enough motive, it's lacking... as well as, if Law wanted Jesse to depend on him, at the end nothing changed. The relationship between them was the same as before the "banishment" ("You are weak" - Jesse, he's not depending on Law, it's still Law depending on Jesse). Also, this would mean that whenever Law says "you're getting close" he is referring to Jesse getting close to choosing Law. That doesn't line up. Jesse clearly had a growing distrust in Law when he was "getting close" A distrust in which he repeated multiple times through each "reset" of Moritat. Thereby, I stand by my view in paragraph one.
The one thing that keeps nagging at me is the "revenge" what is the revenge? My interpretation is that Law wants to grant Jesse's wish of ridding of his trauma (that said, the trauma was real and they are still in Moritat-first paragraph). The most reasonable scenario (that aligns with my interpretation) I could think of is that in that "reset" of Moritat, Jesse's distrust in Law was so great (belief that he was the kidnapper, and responsible for the terrorist attacks) that Law had no other choice but to go along with it... to finally push Jesse off the cliff to reset it again. As for "I knew it would work if it was you" To align with my interpretation, it means overwriting his memory - slowly making the trauma fade away into a foggy memory.
After all that denial, I have to admit... the actual storyline is probably just what was shown in the webtoon. The trauma never happened, it was made up by Law because he wanted Jesse to depend on him. The revenge is revenge for Law putting Jesse in Moritat and deceiving him. "I knew it would work if it was you" is the addition of the trauma to the memory, for Jesse to actually believe it. Supposedly Law was finally over Jesse at the end, but he was still caught up (watching the video), then Jesse went to Law... boom... Jesse chose Law.
The whole terrorist thing was probably based off of the fact that Law's parents died (from Mrs.Brown's orders)... so Moritat was kind of like Law's revenge on the Brown family if you think about it. Idk I'll stick with my interpretation with paragraph one just because I'd prefer that more (and my bias that Law is only doing what is good for Jesse).

I'm sorry but I'm a bit confused with your comment(/TДT)/ or maybe I'm just sleepy. But what I can say is this, Jesse DID go back to reality. How we know that? The traces of cigarette burns in Law´s hand are gone in ch 52 page 18. Besides, after waking up from Moritat, the one who would be sure if it is reality or not would undoubtedly be Jesse. Law doesn't know what Jesse has been up to for the past 5 years, who he now interacts with, his new environment etc. To fool Jesse again, Law would have to be aware of everything going on to place him there again. Did I manage to explain that okay?
Law never meant any revenge against the Brown family. You see in ch 50 how happy Law was in front of Jesse´s mother. He didn't care about that. If there was any revenge intended in his sick game, then it was at Jesse for destroying his life forever, as he briefly mentions in ch 52.
As for the second paragraf, after re-reading it I think I know what you mean. It is true that Law wanted to be chosen by Jesse but also Moritat was a way for him to get rid of his feelings. Inside Moritat, he was allowed to do everything he has ever wished to do to Jesse (but never could in reality). Sure he wanted Jesse to depend on him, manipulate him etc but his actual reason was that he hoped that in fulfilling all his desired in that space, he would finally be able to move on with his life.
As for Law using the same method by throwing Jesse of the balcony, indeed, a good point but my take on is that since Law is the administrator, every time he holds Jesse and and leans him backwards, he can control him (as we see when he strangled him in ch 25). He can either erase his memories, or bring him back to reality. Now how he presses those invisible buttons? Well its fantasy so I don't think the author wants us to concentrate on it ╮( ̄▽ ̄)╭
So I actually disagree with all your points (i hope thats okay:p) But I get it. Immediately after the story finished, I remember there were a few comments wondering if Jesse really is back to reality? I wondered the same for a sec but seeing Law´s palm I threw that thought away since it was the authors way of hinting, besides, it wouldn't be a good ending to the story right?
Last but not least, "I knew it would work if it was you" Law never said that sentence. The first 3 chapters of Moritat in mangago is wrong translation. The rest of them is correct since they were brought by Lezhin. What he actually says is "I knew you would do it, but not this fast". I know its a chock but the translation is completely off, for the right translation, here it is :) https://www.lezhin.com/en/comic/moritat_en/p1
And by that sentence I think Law was praising Jesse for realizing that he was not in reality. Because if Jesse didn't realize that he was inside Moritat, then he would've attacked Law with that knife, but he knew it would be pointless.

Actually, my last paragraph was agreeing with you, what I think the story actually is.
Everything I said in my earlier paragraphs was what I want to interpret the story to be. Since they are in a virtual reality, Law has the power to change anything that happens-I'd like to believe that. I'd like to believe that they are still in Moritat. Following that, the incorrect translation of "I knew you would do it" actually plays in my interpretation's favour because I was iffy about that whole part (whatever I stated in my original comment about this part made little correlation with my actual interpretation). Again, like I started by original comment off with, this is just what I would like to believe (I repeated this so many times you're probably tired of hearing it XD), I'm not saying this is what the story actually is.

ahhh I get it (๑•ㅂ•) But no way the real version is way better because if they were still stuck in Moritat, wouldn´t that be horribly sad? Law put Jesse through all that to vent out his frustration but fortunately he still had some sanity left in him. He didn´t kill Jesse and he didn´t torture him forever.
I´m glad they not still in Moritat as you wished for in your interpretation because clearly they were both losing their minds. Jesse was asking Law to commit double suicide with him and Law was... well, just bonkers like always -.- So Hurray for happy ending!! (❀╹◡╹)
Ein warned Diesel not to get photographed... they are at a photoshoot, I sense conflict coming. Seems like they are worried about someone hunting them down.
Either 1. Pablo is the antagonist (which I've been feelin')
or 2. Diesel and Pablo will end up together
I think they're running from the ppl they showed who were in the snow right after Diesel and Ein explained to Bexan that were were other werewolves in Europe.
Pablo is like a mob boss if you make him mad it's over
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He did get photographed and things turn bad in just 2 chapters:(((((