I contributed the illustration for The Official CG Collection of Nijie (Japanese CG SNS only for R-18).
The following link is a sample of mine.
On nijie [link]
On pixiv [link]
I draw 2 character, nijie-tan(who has Yelow hair) and Gomen-yan(Maganekko).
ニジエたん Nijie-tan is the mascot character of nijie. ごめんやん Gomen-yan is the mascot, too.(She is Gijinka chara of Nijie's technical staff.lol)
The collection of CG is due to be put on the online market in Japan at the end of September. (Probably DL site)