Yeeeeaaaahhhh, it’s not the next chapter of Volume 4 (but we’re working on that soon! But we are releasing the extra chapters at the end of each volume from volume 2 and on. We’ll get to volume one’s omake eventually, but we don’t have the raws for it at the time. Enjoy!
Updated 6/6/21: Replaced 18.3 with second version, first page now has a missing tl fixed 🙂