hattori_masaki
Artist.
Japanese name: はっとりまさき or ハットリ
Blog name: OTO
See also
* Blog: http://mskhtr.blog.fc2.com/* Pixiv account: https://www.pixiv.net/member.php?id=49413
* Twitter account: https://twitter.com/hattori_oto
* Nico Nico Douga account: https://www.nicovideo.jp/user/672156
* Nico Nico Seiga images: http://seiga.nicovideo.jp/user/illust/672156