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- http://www.dlsite.com/maniax/work/=/product_id/RJ297740.html
artist twitter site-https://viid.me/9Mwb9
artists site -https://ouo.io/TR09Yk

Part 1: http://e-hentai.fbk.tokyo/index/g/1229980/d4691f6d82/

Part 2: http://e-hentai.fbk.tokyo/index/g/1283090/c295573bc4/

Part 3: http://e-hentai.fbk.tokyo/index/g/1392385/3e77cb83f8/

Part 4: http://e-hentai.fbk.tokyo/index/g/1676591/17f793c6ce/

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