I think I've played enough to give my thoughts on the game, though I haven't 100%-ed it yet. To be honest, the remaining EDs are all "This character"-Happy End, so I think I have enough to review it.
The cover is here
https://tdnshumi.blogspot.com/2017/10/new-games-a.html
...Yes, I bought this game in 2017. I just played it.
BTW, due to some images, I'm going to say the article is NSFW.