Responses
This author has pretty messed up stories, my best guest is that is was gonna be the same but decided against it in the middle of it. Kinda what happened with this one too https://www.mangago.zone/read-manga/oni_to_tengoku/
I was skeptical during the first few chapters, but now that I'm at chapter 117, it's not as bad as I expected. The (SA) could have easily been left out, it didn't seem necessary to the plot. I'm actually surprised by how much of a plot there is.