Sooooo, everything worked out? Just like that? Ok...
Also, Mahiru, you didn't win, Kou turned into a vampire already, it's just not permanent, but he did it.
Feels like more than a few manga have started putting polyamory on the table. I like it, should've always been a thing.
That being said, if Kawai had been a long running character, I would've hoped for a polyamory end, but I really don't care for her.
You know, it would've been far better if it just went the VN route and had separate routes for all characters rather than
[Mod Edit: Added Spoiler Tag.]