The Calluvia’s Royalty series currently consists of several interconnected standalones: (Harry & Adam) That Irresistible Poison (Seyn & Ksar) Once Upon a Time (Eridan & Castien) Prince's Master (Jihan & Hrethelm)
A 26-year-old financial analyst who becomes fascinated by the quirky and naive "Harry".
A Calluvian prince banished to Earth by his parents. He works at a coffee shop near the office of his love interest.
Calluvia's Royalty complete series (so far) by Alessandra ... - VK
Reviewers on Goodreads generally describe the book as a "beautiful story" featuring a "naive and adorable" protagonist. It is often recommended as a good entry point into Alessandra Hazard's work because it is less "toxic" than some of her other series, like Straight Guys .
MM Sci-Fi Romance (featuring an "alien/human" trope). Characters: