Nagisa no Saameido

When Wataru's parents passed away in a tragic accident, he found himself with no living relatives. Now, his resident maid, Kosame, is his only guardian. She's as loyal as they come, and she's been by Wataru's side ever since he was young...but she's not exactly human! As they live their lives together in the eclectic fishing village they call home, will Wataru manage to win her eternal love...?

(Source: Yen Press)