Finally I completed it. I remember I started reading in the days I was yet to get to an university. Glad to see it finished, though I feel hollow, as if there is so much more I wanted for them to do in this ending. I get it had to be opened, but I'm not a fan of these where the characters go separate ways without having a last talk with each other. As far as Setz knows, all his close friends are dead, he even said a few chapters back Lark was the only one left and all he knew is Lark would have to die for the future where he is at now.
I remember long ago waiting new chapters I read its prototype, Crepuscule's Best Challenge Version before it became an official webtoon, and in it, we had more focus on the characters' relationships. I feel this is something that was lacking in the final version. These interactions were crucial. The webtoon got a more developed plot, but the worldbuilding and the cast suffered for it. Select few like Tepez got that good development.
Anyway, I'm glad to have read this. I feel reasonably fulfilled to see this series I read for so long get its conclusion.