Aiue Oka Hentai
Book releases: Bullied ~Revenge Hypnosis~ | Dreaming Maiden
The artist's name is made up by the first six characters of the Japanese writing system: all the vowels (a, i, u, e, o) and the first consonant (ka). What's more, it's actually a duo who works on their releases: Echizen and Waon, and the latter's name comes from the last three characters: wa, (w)o, and n.
Debut work in X-Eros: #32
Interview: #48
Links: Blog, Twitter (Echizen), Twitter (Waon), Pixiv
