This was cancelled on a big cliffhanger of an ending, if you don't want to have it ruined for you, I suggest reading to chapter 5, page 35 and then stopping.
Another thing to note, the chronological order of events is somewhat odd since the author wanted to write the confession first. They have written in their end notes of the chronological order if you are interested in that:
chapter 1.5 > chapter 2 > chapter 3 > chapter 1 > chapter 4 > chapter 5 > chapter 6 > chapter 7 > chapter 8 > chapter 9