Artist.
Japanese name: こしばや (Koshibaya)
Old name: コバヤシ (Kobayashi)
Site name: チラシの裏
https://www.pixiv.net/users/9432856
https://www.pixiv.net/stacc/etb
https://twitter.com/ksby555
https://twitter.com/yel_ksby
https://twitter.com/intent/user?user_id=3062617322
https://twitter.com/intent/user?user_id=905311666887245824
https://sketch.pixiv.net/@etb
http://555551111100000.blog.fc2.com
https://privatter.net/u/ksby555