Once upon a time, there lived a girl named Ruby. Ruby's family has had a terrible reputation with an anonymous gang, and the gang is thirsty for revenge, so they take it out on Ruby, and because of that, Ruby ends up in a life or death situation very often, and it is terrifying for Ruby. Although, she's very very fortunate to have a man who Ruby calls, "The Nameless Prince" to save Ruby in those situations. Ruby calls the man "The Nameless Prince" since he is always there to save her once she is in trouble, but she doesn't even know his name, and she has only seen him clearly once. The question is... will he always be there to save her?