Cross-platform desktop application to download manga from various services
kotatsu-dl-git is available on AUR:
yay -S kotatsu-dl-git
Windows or other Linux distro
Just download an appropriate archive from the latest release.
Kotatsu is Free Software: You can use, study share and improve it at your will. Specifically you can redistribute and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
The developers of this application does not have any affiliation with the content providers available.