shiki_no_kyouken
四季の狂剣 (しきのきょうけん)
Doujin game by Circle Myofuu-kai.
See also
- Digital distribution site (1,575 JPY): http://www.dlsite.com/eng/work/=/product_id/RE116142.html
- Official page: http://hoppeman.sakura.ne.jp/siki/
- Nicopedia: http://dic.nicovideo.jp/id/2904577