If you don't like harems don't worry the ending will only end with one other partner so just suck it up and get through it and don't whine like a baby about there being multiple girls.

of her brother's death and kept seeking revenge without even investigating properly

I mean Chae Nayun is a useless character... author kept making her like an important one, saying she's a genius swordsman, or for her sad past, and even on the epilogue, when MC said that she might be the reason he came to love that world, but ?? on what part? unless I didn't realize? I dont even see any character development from Nayun until the very end, sure she found out the truth but she didn't really change, for me it's just like she has come to a realization and thats it, author kept on bringing up her name every damn moment he can, and she's not even the FL, I just didn't like her from the start specially when she started misunderstanding that MC has a crush on her, wow what an attention whore~

I hope that Kim Hajin's relationship with Chae Nayun should not end as happened in the last few chapters. I can't believe that the development of Chae Nayun's character and his complicated relationships, such as misunderstanding, hatred, and love for Kim Hajin must end sadly.

Kim Hajin and Boss, the writers did decide to pair them, but I still can't accept them, because I think Chae Nayun has the right to a happy ending, given what she has experienced and misunderstandings throughout the story.

The story is very exciting at the beginning, around chapter 100-150. The story starts boring and spinning, when Kim Hajin leaves the Cube like entering a tower, then to another world, after that to another world again (Akatrina)

It's a bit amusing how the co-author considers the story a masterpiece at the end when it's anything but. There was also no reason to take Hajin's power and gear at the end since he can apparently give stuff back and there's a lot of loose and abandoned plot threads like Chundong and Akatarina.

As other readers have pointed out, the story went downhill at the latter half of the story which in my opinion is because of 2 major reasons:

One would be not giving any justice for Chae Nayun with the author not giving her a proper talk with the MC until the last chapter, it is a shame since MC and her was a much better and much more interesting pairing. Not that I don't like who MC ended with but Chae Nayun and MC's chemistry before their parting was just too good that it is a shame that basically nothing follows up on it especially when we are teased about their meeting every 5-10 chapters when it actually happened at the end. This was such a major problem that this reason alone is what made me feel bitter about the ending. She deserves much much MUCH more considering what she's been through.

The other problem was that on the climax of two major arcs, the Orden and Baal arc, the MC had very little participation in that all out battle against them. I know that I said the other characters are interesting and I get that Kim Suho has to be the major participant but these characters are only made interesting with the MCs intervention that is why it feels dull when he isn't participating. In those fights all I could remember that he did was pass on his power to Kim Suho and fire a single bullet while waiting at the right time respectively. With the other characters having too much focus, it had become less about the MC and more about the other characters.

As a side note: I wished that Rachel and Yoo Yeonha had at least conveyed their feelings to MC in the end but unfortunately they it didn't happen, but there are still side chapters so I can look forward to that. There seem to also be some side stuff that the author failed to deliver on like on the two devils Vassago and Leraje, really wanted to see Leraje meet Kim Hajin again and want clarification if the accessory Vassago requested was actually made and given to her, she even gave a time limit of 3 days making it feel like a big deal.

his complicated relationship to the different girls, his secret identity, the incident in the back story