Here is the part of the Atarashii Seikyouiku series set in the same world of Atarashii Seikyouiku

It is about a young man named tomayo who used the sex pills to transform into a woman to have group sex with her elders
Dlsite- https://www.dlsite.com/maniax/work/=/product_id/RJ297740.html
artist twitter site-https://twitter.com/mangayutakadou?lang=en
artists site -http://mangayutakadou.blog.fc2.com/

Part 1: /g/1229980/d4691f6d82/

Part 2: /g/1283090/c295573bc4/

Part 3: /g/1392385/3e77cb83f8/

Part 4: /g/1676591/17f793c6ce/

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