Hmmm..

Leaving this topic comment here so if I decided to come back and give this another try, I can easily see it.

But no, srsly, for a vampire concept, it gets boring easily. The plot can literally work without the vampire theme, they should have utilized that concept more by world building. It's such a waste of opportunity to just use it as a side idea for the story to go on. If you try to remove the vampire elements, you could literally substitute it for something more normal and the story would still work, and that isn't supposed to happen if the concept was utilized properly. Dropped this in chapter 23, I can't feel any chemistry between the couples as well so I got easily bored with it.