Onna Kishi no Shiro group has a lot of TS/Gender-bender doujins like from TenSura, Onimai, Twintails ni Narimasu, Eiyuuou. Buy and support the group if you want more.

Pixiv artist: https://www.pixiv.net/en/users/166411
Pixiv post: https://www.pixiv.net/en/artworks/120710581

Buy at:
https://www.dlsite.com/maniax/work/=/product_id/RJ01212016.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_401675

MTL'ed description:
This is a fan fiction work of Tensura, in which Rimuru Tempest is manipulated by the enemy to transform into the body of a beautiful girl, and is caressed all over the body, forced to masturbate, dildo insertion, public masturbation and urination, alcohol is poured into the uterus, orgy reverse rape with rough adventurers, sex slave of royalty and nobility, gang rape by soldiers and slaves, and speculum expansion!
The author is Yukimi Iris-sensei, and the scenario is by Knight, so please enjoy!

List of play contents:
-After transforming into a beautiful girl body, the whole body is caressed by the wrists of several mannequins
-In erotic underwear, masturbation + dildo insertion while showing off your appearance
-In a bikini maid outfit, public masturbation + urination + alcohol poured into the uterus at a bar
-In the drunken state, she pushes down rowdy adventurers at the bar, reverse rape + milking them in the uterus
-Sold off to royalty in a dress, raped on the throne in public + ejaculated in the uterus
-Made to beg for dicks from priests and nobles, raped + ejaculated in the uterus
-In a bunny girl outfit, she performs sexual services on soldiers, gang rape + ejaculated in the uterus
-She performs sexual services on slaves, gang rapes them, then has her speculum expanded and left to cum inside