This is from Muy-x's DeviantArt, which means that there are more pages but on the artist's Patreon only.
Here's a part of informations given by the creator:

Re-Training Classroom is a manga project based on the characters from Assassination Classroom. (This manga has adult versions of the characters).
This is vol. 1 contains 22 black and white pages.
The plot: "After the events occurred during her talk with Koro-sensei, about her son leaving his class, and later attempt to burn down the classroom, Hiromi Shiota realized that Nagisa is growing into a proper man .... something she will not allow."

If you want to know more, you can go on his DA post where he explains everything about this work https://www.deviantart.com/muy-x/art/Re-Training-Classroom-ABDL-manga-NOW-AVAILABLE-862843656

This is a good find. Didn't know this comic existed.

Base +6, just quite +6, Inconspiquetoe +6, Yaguix816 +4, SonicGTR +6, firehaz +11, justanothercreeper +6, robô1639 +1

Muy X made another diaper comic but it's a bit weird, you can see it on their DA

Base +3, firehaz +11

It's a good find and the art is pretty good, but the text really needed to be cleaned up before posting this; a lot of the wording comes across like it was translated by someone who speaks English as a second language. Perhaps get someone who speaks it fluently to overlook it or something?

Base +6, Zombielord -6, smld +1, koda42 -6, Faulks +7, shrö +6, LunaCat +6, Slave Girl -16, Night Rod +6

I do really love this dynamic and it was really cool when Nagisa and his mother's relationship showed up in the show. I really wish more doujins explored it like this one.

Art 7. Plot 7. Sexiness 8. English 4. True to character 6. All out of 10.

Base +8, Alayah -6, firehaz +11

Needs more pages. Cant wait for it to be continued.

Base +6, justanothercreeper +6, Darthnader18 +7, kema7 +6

Did I miss something? Kana is portrayed as a little girl up until 46 when she's as tall as her mother

Base +6, Gorm +7