Otome game parody where a background character who is married off to the villainess is a guy isekaied from the modern era.

Pages 2-33 Pixiv expansion of the story plus original Twitter works
Pages 34-57 Fanbox expansion of the sex scene plus textless work

Please support the artist if you enjoy their work!
https://f7xl5wl6a.fanbox.cc/posts/4954980

https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG28361.html
https://www.dmm.co.jp/dc/doujin/-/list/=/article=maker/id=73293
https://www.pixiv.net/en/users/6034776
https://twitter.com/alaruck_tui089
http://araruck1478.blog.2nt.com
https://pawoo.net/@alacarteru4165

Is there some specific word or phrase you can search for doujins/hentai/etc. that give specific dick size measurements like this? I've seen it in a few CG sets like this but I don't think there's really any kind of tag for it on any sites.

Base +6, okawabi +21, OMJay +6, Jewessfan +5