Personally, this was a 10/10 for me.
I read the eng translation somewhere else, and felt like writing my thoughts on it.
I binge read this thing in like 2 days, I couldn't put it down. I absolutely loved how the MC is just an absolute psychopath (even if she doesn't quite 100% falls into that slot) -- everything about how she behaves, talks and acts, is for the sake of killing more people. And not "for justice", but because she's just a blood thirsty bloodhound.
She controls her emotions by completely dissociating on-command like a well oiled machine, she doesn't even care if she's "found out" and have her "life ruined", she wants to fucking kill people.
At first, I felt anxious for the MC who's too immature, and exposes herself too easily, but as the story went on -- it became obvious she had too much fun killing people, and her entire demeanor and the way she interacted with people made it obvious: THIS IS NOT A NORMAL GIRL "GONE BAD" BY HAVING TOO MUCH POWER. THIS GIRL WAS FUCKED UP FROM THE BEGINNING, neither was she a good-natured vigilante who became too extreme and lost her way (like, maybe, Light from Death Note?)
Nope. She's a fucking killer like Dexter, who isn't a slasher villain who kills mindlessly, but does so in a very digestable, sympathiable way, where their targets are the scum of society; there's specificity to their diet, and to their craziness -- and they're still capable of caring for people and have emotions. I just figured out I absolutely love this sort of a character.
That made me love reading this thing through and through, even though the ending is very much meh (it just kinda ends, even the author admitted he was too inexperienced to run the comic proper), and from the mid-point things became a touch too conveneint for the MC, and how she interacts with "the detective". It truly becomes apparent that the author couldn't really tell where to take the story, and just tries to keep the suspense and action consistent, without making things fall apart.
But, still, all things considered, I enjoyed the MC, and the lil' play of cat-and-mouse in this thing to the very end, because I didn't expect such a brutal story when I started, and I didn't expect such a sociopath of an anti-hero who was still sympathiable. Truly great work on the characterization in this thing.