https://www.pixiv.net/users/2948941
https://www.pixiv.net/stacc/ra-bit
https://ja.wikipedia.org/wiki/シエラ_(イラストレーター)
http://marrybellis.wixsite.com/ringlet-jp
https://www.pixiv.net/users/3189233
https://www.pixiv.net/stacc/lemona6-4
https://twitter.com/m_seseragi
https://twitter.com/intent/user?user_id=765672674
