Ok, as top review already pointed out, this series was originally a series of pointless artworks drawn by Himura Kiseki on his Twitter account (@strangestone), Monday Morning Offering, as he named it. It's basically just girls, with a huge set of breats, in all kind of poses wearing pretty much just a pair of skimpy bikini or other provocative garments to be something for working salarymen look forward to on Mondays.
But then, in the 33th one of the series, Himura seemed to start developing a story around a girl later known as "Ai-chan" or the girl at the station. And then, by 36th piece, she became a main character in the series with several more characters. He also published some amount of compilation artwork in a doujinshi published in Comic Market 89 at the end of 2015 by the title of "Getsuyoubi no Tawawa". In that book, he made a little side story to the end which became the first episode of these shorts.
After that, the series on Twitter continues, as well as a compilation every Comiket ever since, which means it's about 3+ years already (review written in 3/2019).
I'm not going to say much about its content anymore since there isn't that much to talk about. It's basically a working adult man relationship with a big-breasted cute/beautiful girl and the lives around her. And there are several pairs at that.
If you follow the series on Twitter, or see the compilation somewhere (I would recommend Danbooru, however cancer you may see the website), you should know how well written, well developed, heart warming daily (or weekly) modern day life. It's even more interesting to see how it keeps referencing back tracks while keeping track of real life time too.
In short, it's not very good. But since these shorts are only starting line, you should dig somewhat better to fully appreciate it.
