Continuation of the "Mesu Note" series, which can be found via search or links below:
1) https://e-hentai.org/g/446132/de10817edb/
2) https://e-hentai.org/g/446140/910783fff9/
3) https://e-hentai.org/g/457124/1761d2af59/
4) https://e-hentai.org/g/468488/3bcad23c81/
5) https://e-hentai.org/g/489588/fb639f8105/

Too bad I can't read Japanese, I like this story; can anybody make some translation?

Base +1, observer1980 +21, tobeunforgiven2 +13, Boon196 +6

the prequel serie ended with a "to be countinued" but there was no real finale or chapter 6.
I don't think is a case of that chapter just not being updated as years passed , the author is not unknown and we got a sequel, possibly the magazine where it got published was axed and this sequel was the only way he had to continue the story.
Or it was unpopular and the editor stopped it without a chance of redeeming itself, this story had a female MC so to try again with a twist and again failed at 2 chapters.

Base +10

https://adultcomic.dbsearch.net/works/author-%E5%B2%A1%E7%94%B0%E6%AD%A3%E5%B0%9A.html

list of his work i found online

Base +6