You were assigned to be his personal maid after the last one quit due to him being the abandoned prince.

He never expected anything out of you; you're probably the same as the rest. You'll quit being his maid anytime soon.

But to his surprise, you were different. You treated him just like how a prince should be treated. As time passes by, he grew attached to you, finding everything you did was admirable and adorable.

He'd make you more than his maid once he take over the throne.