Honestly I like this ending, if I understand Miichan is the other personality of Amamiya. Given she's already put herself through enormous hardships, I believe Miichan was able to kill Amamiya in the end, leaving Miichan with a crippled body, but still she'll live. That ending shot, with the two going off into the background as blood trails, has the feel of other horror stories where the participants overcame the trials in front of them.
Characters were odd, good nonetheless. No doubt a constant deluge of torture for Hoshino, but in a cruel way he's used to it. In particular Miichan was great, seeing her slowly work towards protecting Hoshiro from her other personality. Given the ending its now unclear whk was in control at various points of the story, Miichan or Amamiya.
Blood and gore there was, although its horror so what can I expect otherwise? It contributed to the story. Lastly the art, which was fantastic, it amplified and toned down scenes when needed.
A bunch of violence, a good romance, some harem to spice things up, this was a good story because it is so odd.
7/10.