I loved this since it was so unique!! I also have very little knowledge about DID but I do know generally what it is, I'm pretty sure it wouldn't be that easy just alters leaving on their own like it is depicted in this manga but I think it's great how the author made a story about DID and potentially spread awareness about this mental issue. Overall I'm super sad about Kazuha leaving but still I loved this story. It was amazing! Hope to see more of Rei and Yuuma's happiness :)) <3
Adam no Rokkotsu