Pernicious means being harmful especially in a gradual or subtle way. Dont bother if under 15 i guess ? Quite disturbing.

Lucien and Marina are the world's most unlikely couple. A playboy vampire and a sweet but poor mermaid, they do share one thing. A complete love for their canine companions. As the two grow to know each other, a budding relationship blooms into existence. But when the troubles of life coming call...

A castle part of the midst of an endless winter. A vampires castle, And her butler.

The story is about Gertrude Smithins, his bad personality and his far and few friends.