Samantha P. and the Wishing Well

Samantha P. has been full of wishes since the day she was born. When she discovers a magical wishing well that appears out of nowhere, she makes the life-changing wish for a crazy, wonderful, unbelievable romance. Everett, a half-demon who's magically transported to earth by Samantha P.'s greatest wish yet, longs for the exact same thing when he first lays eyes on her. The catch? He's only allowed three days on earth at every full moon. Samantha will have to leave her old life behind to attend a boarding school where she hopes to find answers for how to free Everett from an unfair imprisonment with the help of his very frightening all-demon father.
Along the way she also uncovers some unsettling secrets surrounding school hauntings and a rather peculiar headmaster. Everything comes together in the end, requiring the greatest sacrifice of all from Samantha P. if she's going to save her beloved half-demon.