Artist, mangaka.
Japanese name: 火山一角 (ひやま いずみ, Hiyama Izumi)
Old pen-name: 氷山 一角 (Hiyama Izumi)
https://www.pixiv.net/users/2182747
https://www.pixiv.net/stacc/wttdh
https://twitter.com/hiyamaizumi
https://twitter.com/yousaiclassroom
https://twitter.com/intent/user?user_id=1944699476
https://twitter.com/intent/user?user_id=1322017823988744199
https://nijie.info/members.php?id=172795
https://sketch.pixiv.net/@wttdh
http://b.dlsite.net/RG37960/
