MaMaKoi [English], by Kagami
It’s difficult, to deal with something alien to your own way of thinking. You do your best to understand it from the outside, over time you recognize patterns and recurring “mechanisms” with effects you can predict. But, still, essentially, it remains weird to watch.
The present share is one of those stories. It nears two separate shores, cuck fetish and netorare, without closing in enough to belong in there, leaving your usual Oliver with a “why the fuck was it written? I mean, save for masturbating. Why?!?” mindset.
Anyway, it’s your call, but if you DID love the story, let me know in a comment how it “clicked” with you, maybe? I’m honestly, earnestly intrigued.
The story, in short: a male teenager has the butterflies for his new stepmom, but his best friend steals the first fuck with her almost under his nose. Without evil intents, none meant, but still that boy watches from a hidden position the entire scene taking place, his dreams (that the respectable woman he knows had a hidden naughty side and loved teenage dick) came true but not with him, etcetera.
It looks good, at least. For the rest… Joker.
It’s been released by Fated Circle, thank you!
By the same artist, I also share Tonari No Heya No OL-san.
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(16 MB, 31 pictures, English)
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2 – or – Zip Mirror #3
I don’t think I’d call it NTR and/or cucking. A kid has a crush on his stepmom and gets to watch her screwing someone besides his dad. A lot of guys in Japan have a beta/doormat personality, I’d say this is catering to that. It’s just voyeurism, like watching a porn movie where some stud screws a hottie. The kid already admitted that he’d never have the guts to make a move on her, so he got to watch her getting laid. Better than nothing!
Honnestly, i just feel bad for the dad, even tough he’s not in the story at all. Brand new wife, freshly married, and allready cheating on him with the first fucking random guy that comes begging…
I also wonder if the “friend” didnt befriend protag-kun with ulterior motives from the get go…
oh well, thanks for the share!
(If protag-kun was smart, he’d have filmed the whole thing, cut off “friend-kun” and used it to blackmail stepmom into submission :D)
Page 10, the boobs invaded, and they brought hot, monkey sex with them.
After that it was scorched earth and a plot left in shambles.
Dude, I laughed my butt off at this one! Well zinged! :-)
I wonder if that protag-kun friend is truly a “friend”… Oh well, you know, in this year, I have seen so many NTR doujin with mother, sister, childhood friend, girlfriend, and wives got stolen by ths so-called “best friend” plot. Aw… Maaan, they never tired with this kind of plot for fast cash!!!… sigh