Chastity Reverse World - Ch. 36 - They’re Wearing Such Beautiful Expressions, Aren’t They? It Doesn’t Seem Real. They’re Bored! And...

[Ducky09]

If you're interested at all, due to how popular the theme has become, there's a bunch of other explicit works inspired by it. Random examples (Read them on SadPanda);

• 'Teisou Gyakuten Abekobe Banashi', an ongoing Girlz und Panzer doujin series by Mugen Mousou. Note best to treat it as an original work rather than an actual doujin as every acts very out of characters.
• 'Teisou Gyakuten Goudou', original one-shot by Rebis
• 'Kami-machi Saito de Shojo ni Dakareru Tatta Hitotsu no Saeta Yarikata', original one-shot by Igakino Agenasu
• 'A World of Reversed Sexual Morality: John-san' an original smut web novel by ChastityQM (Read on Fanfiction.net).

Sadly I haven't come across anything with world building like Amahara includes, I appreciate the small touches like the sexual acts having different names.
Also I recommend looking in to series with a setting where men are less common than women, they often share similar themes to reverse gender roles works. Ex. 'Danjohi ga Bukkowareta Sekai no Hito to Jinsei wo Koukanshimashita' a webnovel by Mogi Suzu

There's a free visual novel game on Itch io, about where a guy from the past gets sent into the future and finds out that all men have died off and the only remants of them are from media such as movies and videos, they found away to reproduce using clones but they cant create male humans, so they use Androids to replicate the feeling. Its a good game and has an okay story, mainly focuses on comedy and romance.

Its called "Android life" By Mate Dolce

 

[comedyxtragedy]

If people were to expand their horizons, wouldn't they eventually get into the weirder fetishes? Like the impossible ones that exist in fiction or scat...

I think there's eventually something that is impossible to like. Like I know guro exist, but I just can't into it.
When it comes to fetish, it's either hit or miss.

 

[Ebbelille]

was this dropped?

 

[Marshal_Zhukov]

It has been a a year