https://www.pixiv.net/en/users/30780986
https://twitter.com/HiepStudio

Support the artist at:
https://www.patreon.com/hiepstudio/posts (infrequent update)
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG61689.html (discounted till 13th Feb)

Commission at:
https://www.fiverr.com/hiepstudio

Collection of this artist from various sources, with duplicates removed. His doujinshi may be updated at a later date.

His Patreon won't be updated regularly (as noted by the artist himself), but there're new uploads here and there - still, I would only recommend his Patreon as a way to send support, and not as an ongoing subscription. However, you do have access to both his dlsite works from his Patreon, so it's a good way to save cost if you want to buy both.