This release includes chapter 21, the preview of the next volume, and a short two-page omake. With this, volume 4 of Spiral Alive is now done! Yay~ The next volume is the last volume. :(
Well, I'm quite tired now so I'll take a little break before continuing with the scanlation.
Oh, and a new character makes an appearance. Enjoy!
Credits
Editor/Translator: Yumina
Raws: raw1st.org
Download link: MediaFire