MarsSeed [1] filed a deletion request for kawanime [2]: Repository and source tarballs were removed from GitHub due to DMCA takedown.
But even befor that, the package failed to build for me a year ago. The code was last updated 4 years ago. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kawanime/
