Lore and Lust is a completely captivating, sensuously slow romance with a definite bite! Haruka and Nino are both utterly charming characters. Their personalities are so realistic and multifaceted. Haruka is mysterious where Nino is open but as reader you get to know them both so well that you're really invested in their lives and want to read more! 
The spicy scenes are well written and occur not so frequently that they overwhelm the story but  enough to satisfy the reader of a book called 'Lore and Lust'! 
The vampire lore is fascinating and really unique. This was a standout strength of the book for me. A lot of thought has gone into how it works and how their perspective on their history as a species drives the characters in different ways. 
My critique would be that I'd have loved more chapters from Nino's perspective especially towards the end of the book, and I'd have liked a little more movement on the mystery element of the book! It had me really engaged and I'd have loved more. Roll on book 2!