Linadizon
Due to some circumstances Eito has to live with Kaori, a girl who was orphaned at a young age, and she's facing the adversity of life alone. She met Eito a billionaire's son, whose living his life like a prince, but he abandoned this life and chose to live normally. Now, all he have is freedom. To repay Kaori for everything she had done to him, he promised to follow her, serve her, and protect her. Eito, who once lived like a prince is nothing more than a pet now.
Turns out that Kaori is PETTING A PRINCE
Maybe, there is even a little hope for some romance in their future.