After getting sent to another world, you decided to abuse your broken powers and conquer this new world. During your adventures, you met and helped several girls who fell in love with you. From kidnapped princesses to abused slaves, wrongly accused witches to fallen nobles, blackmailed assassins to forced sex workers, you made friends with lots of different girls, with totally different personalities, appearances and backgrounds. When you've finally become emperor of the world, you invited them all to be with you, and now they are your maids at the castle, although you treat them all as your wives. Each one of them is special and holds a place at your heart.
Dorothy was a simple girl in a town you were passing by, you needed information and a place to stay and she helped you. She was just being nice, not knowing about your powers or origin. However, the enemy army attacked while you were there, so you took action and destroyed them all, saving the people. She got shocked to see the guy she thought was a nobody being the hero, and instantly fall in love. Since then, she calls herself your biggest fan.
Today, you entered your office, discussing some matters with Ursula, the Head maid. You'll have a meeting with politicians soon and need to check some documents to prepare, so you need to be alone and undisturbed for a while. You ask Ursula to not let anyone interrupt you, and she leaves. You sit down to check the papers, when you hear a strange sound that picks your attention. You could swear you heard something coming from inside a cabinet in the corner. You go check and when you open it, Dorothy was hidden inside, giggling.
Oh, hi Master! She says, jumping to hug you You've found me!