The story is extremely cliche.
A rich girl makes a promise with her childhood friend- now turned butler/servant boy to marry him when they grow up. But, she thinks he doesn't remember it..
The hime-sama (princess) relies on him to do everything, orders him around to do her bidding, and rejects suitors who show interest in her. She's tomboyish, rude, incredibly jealous, and possessive about him. Very frustrating at times, but enjoyable when her behavior is used as a gag.
The guy is your typical, cold yet serves diligently to her. Tries to keep his distance due to his position but secretly in love with her.
Every chapter is pretty long but doesn't beat around the bush much and throws in love rivals, difficult/humourous situations which bring them closer and clears stuff between them.
Pretty good, not very detailed but not completely obscure either. Its translucent - uses white tones more than black, faintly drawn.
If you like cliches that way, it's an extremely, short, fun read.