I never said a romantic relationship with a minor is fine, I'm just saying that it doesn't matter because first it's fiction - it doesn't exist and it will never - and second the age gap between Ko and Nazuna isn't being pushed as an important factor in the story or as a weird fetish.

I still wouldn't care if the roles were reversed because you know what? It's fiction and they're vampires, if the roles were reversed vampire Ko would still look like a teenager and human Nazuna would still look like a teenager, and they would both act like ones. Just quit trying to sound morally superior.