This is another retouched version of the doujin done by the artist. No new content to the book aside from that. It does look nicer all in all much like the previous doujin that was retouched.

https://www.pixiv.net/en/artworks/113766222

You can compare it to other versions available if you like.
Scan

Also, do support the artist if you can.

https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_317773

https://www.dlsite.com/maniax/work/=/product_id/RJ042468

Here is hoping for an English translation and maybe a colorized version in the near future.

Base +6, ArvinAndRussel +6