Manga similar to Teiso Gyakuten Sekai

369yin said:
I think the only non hentai-ish is

Girl Be... by TAMAKOSHI Hiroyuki

Nudity is there and the (sex) panel is just one panel for each chapter at the very least.
Finding this one is fishy. Try checking /a/, /h/ or /d/ archives for this one.
Has 4 volume with each different stories about couples and such.
This fucking genre is so FREAKING RARE.

369yin said:
After 1 year of trying to research for this similar manga and doujinshi i found what i can. They are hentai and game cg and artist cg.

Hentai and CGS

These can be found on hitomi.la and e-hentai and exhentai.

GirlPan Abekobe Teisou Gyakuten

Chuunen Ryman Gyakuten Sekai De Nakadashi Sex!
Gyakuten Sekai de Nakadashi Sex!! ( Japanese Name is (同人CG集) [Dead Ranker (霜月なごみ)] 逆転世界で中出しセックス!! )

Parallel World Kanojo Chapter 2 (Only this chapter that dewells in the side of gender role reversal. Other chapter are fucking trash tier tentacle rape)

Seiteki Kachikan Gyakuten Series _Tobiori Jisatsu Shisou na Kouhai o Ecchi de Yamesaseru Hanashi_

新約・性的価値観逆転シミュレーション 「女体育教師編」

男女の性的価値観が逆転した世界

(同人CG集) [丘ロン] 貞操逆転世界で先輩女子たちに昏睡レイプされる話
[丘のロンロン春の道♪] 貞操逆転世界で女の子からレイプされまくる

A man became a plaything in a fantasy world where the roles of men and women exchanged (this one you have to use the author name and use dlsite and i think it was https://e-hentaidb.com that you can search it up)

Bessatsu Comic Unreal Teisou Kannen Gyakuten Hen Vol. 1
Bessatsu Comic Unreal Teisou Kannen Gyakuten Hen Vol. 2

Haramase Houdai Harem Sekai Joshi Zenin ga Hatsujouki MAX nanoni Bokki Dekiru Otoko ga Ore Hitori shika Inakattara [台風日和] 孕ませ放題ハーレム世界 女子全員が発情期MAXなのに勃起できる男が俺一人しかいなかったら (for this one i am not so sure this is role reversal)

(C82 [nWa] NEO-QUEENDOM Vol.6 [Zunta] - She's Lost Control (English) [SaHa]
(This one is just matriarchy world but never the last role reversal)

DLsite links

I haven't found any for these doushinjis and

リバースワールド＆ビッチ【単話】link https://www.dlsite.com/books/work/=/product_id/BJ150895.html

貞操観念が逆転して童貞女子がエッチに飢えた学園
https://www.dlsite.com/books/work/=/product_id/BJ094707.html

男と女の性の価値観が逆転した世界
https://www.dlsite.com/maniax/work/=/product_id/RJ210585.html

男女の性的価値観が逆転する強制閉鎖空間ハーレム ～スクールカースト最下層の僕しか男がいなくなった空間では女の子が僕を奪い合う!?～
https://www.dlsite.com/maniax/work/=/product_id/RJ263032.html

Schoolboys' D*cks Are Targeted in the Chastity Reversed World!
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE214857.html

A girl talked to me and...... [Chastity Reversed World]
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE245327.html

Mamoru of the Anti Sex Crime Department
https://www.dlsite.com/ecchi-eng/work/=/product_id/RE212959.html

This is all i know.