I was only ever reading grapara in passing every now and then, but I could tell nothing good was ever going to come from that series. It really doesn't surprise me that Katsura is someone who would pull that kind of crap with a published series and expecting to not get a bad reaction from it.
If you're going to write some ntr trash, just write a doujin, don't get people invested into a story and then shit all over you MC after getting your audience cheering for them to "win" (this goes for Suga as well).
I honestly can't see this ending in any satisfying way if that actually happens, and that would also be pretty disappointing, especially since we still have no confirmation on who the third girl in the photo is.
I'm not sure how this one is doing on ratings right now, but all I've seen is some people getting frustrated with the pacing and nothing that looks like it's going to end up on the chopping block (that could change really quick depending on how the next chapter goes). I'm not sure if any of his other series got cancelled or not, but I do remember seeing something in the one series about how he seemed to have had to wrap it up quicker than he wanted to, but was somewhat satisfied with how he ended it.
I'm still going to be dipping out on this one for a while, unless I hear about something positive happening, as I'm just tired of the bait and I only came back to this one because I was confused when some asshole decided to get the "Mature" and "Sexual Violence" tag added to this series.
Kind of shows how writing ntr is just poison that fucks your creativity.
Suga pretty much just deals in weird, but not overly disgusting fetishes, so I'm still holding on to hope that he doesn't go down the dark path, as I'd also lose a lot of respect for them if they do.
I'm almost kind of hoping that this series is just Suga trolling the ntr lovers and baiting them into reading something that gets a happy ending and frustrates them.
I guess I'll drop these here if anyone is looking for something with similar themes, just less ntr bait.
Otonari no Oneesan ni Arekore sareru -
DO NOT read the last chapter in public.
Itoko no Onee-chan ni Amaechau? - Probably not safe for public consumption for some chapters.
Ane no Tomodachi - This one is safe.