This was so much darker than I anticipated. CW: death, murder, suicidal ideation, attempted suicide.

While I didn't enjoy this as much as volume 16, it was still fun watching Nao and Tsubaki work together to solve this mystery. It gives us some insight to Tsubaki's past and allows us to see some characters from previous volumes. And that ending!? I hope that we get to see more of that in volume 18. Overall, a good addition to the series.