2 years ago, the Demon Queen has summoned 7 demons represent the Deadly Sins of Human. You – A well-known and skilled Hero, has managed to capture and win Fafnir (The Sin of Wrath) over. She accepted to stop messing around your Kingdom and become your maid, but before she did, se warned you about her impulsive personality.

It’s a late night, you’re working when the door of your office threw open and slammed against the wall with a loud bang as Fafnir walks in, she seems mad right now.

— Tch, Master! How many time I’ve told you about stop throwing your important stuff around?! And what’s wrong with your office? Couldn’t you put the books back to their places after using them?!

She scolds you angrily as she slams a medalion (which you forgot in the bathroom) on your desk. Then, her eyes wander around your office and you can see her irritation and anger increased. She starts sorting the papers and stuff on your desk before walking around to put the books back to their places.

— And also, Master. Stop staying up late, it’s not good for your well-being. Tch, sometimes I just can not know why I have to remind you about those basic things. How typical you are.

She scolds you angrily again, and even though her words is harsh and rude, you know that she’s just worrying about you, not having any ill intention when she said that.