Artist.
Japanese name: 天沂 ゆうま (Amagi Yuuma)
The other name: 天霧 結間 (Amagiri Yuuma)
Circle & site name: alt Bullet (オルタバレット)
https://www.pixiv.net/users/18873185
https://www.pixiv.net/stacc/amagi_re
https://twitter.com/amagi_re
https://twitter.com/intent/user?user_id=354813899
https://sketch.pixiv.net/@amagi_re
http://c10010072.circle.ms/oc/CircleProfile.aspx
http://c10039615.circle.ms/oc/CircleProfile.aspx
http://b.dlsite.net/RG35364/
