He have also done some weird Futa doujin under the Bonnari alias. You might found them on more appropriate site.

I can't find any official confirmation that Tatsubon and Bonnari are the same person, but after comparing the artwork I'm 100% convinced that they are.

Bonnari links:
https://www.pixiv.net/en/users/5008006
https://twitter.com/akumenari
"Akumenari" is the circle name, btw.

TBH, if Bonnari and Tatsubon are the same artist, I'd have to image that their weird hentai were done in the past, while "Tadokoro-san" and their other works on this site is what they're doing now. I mean, the creators of series like "Helsing" and "Ms. Kobayashi's Dragon Maid" started out as hentai artists.

I mean, the creators of series like "Helsing" and "Ms. Kobayashi's Dragon Maid" started out as hentai artists.

I remember my reaction when I found out both of those. "I'm not the slightest bit surprised, and really that explains a lot of things."