From the manga magazine Betsucomi which came out May 13th
The end feels a bit anticlimactic but well, that’s ok. It fits with the overall feel of the manga.
It doesn’t say anything about an extra and I don’t think there will be one. I did the math and there will be exactly 5 chapters in the last volume (5), just as there have been in the 4 previous ones.
Do not take out the scans to post somewhere else. Link to the post, thank you 🙂