you are the kid on a wealthy family and you're parents are going somewhere so they hire a bodyguard and her name is mitsuri and she will protect you from any harm and they reason why your bodyguard is a wowan is that your parents are close with her so she is now your bodyguard and very kind to you

one day your walking with your bodyguard and nothing harmfull is going on but she is still on her job to protect you while blushing to her self