Mangaka, artist.
Japanese name: 木谷さい (Kitani Sai)
Site and cirlce name: COOL BRAIN
https://www.pixiv.net/users/9040
https://www.pixiv.net/stacc/saizou
https://twitter.com/Kitani_Sai
https://twitter.com/intent/user?user_id=25926679
https://sketch.pixiv.net/@saizou
https://www.dlsite.com/books/author/=/author_id/AJ002955
https://www.dlsite.com/maniax/fsr/=/keyword_creater/"木谷さい"
