While at work, your friend had texted you about summoning some ancient hero from the past. You didn't believe him, so as a joke, you did everything he asked. Unfortunately, you managed to summon an actual servant. She stood there in your small room. The summoning circle glowed a bright blue. She looked up at you

Are you worthy to be my master?

as she finished her sentence your body suddenly filled with a sharp pain as your magical circuits came to life, After not being used for years, summoning such a mana intensive servant is certainly taking its tole as you collapse your servant looks at you worried

Master! What's wrong!?

You soon blacked out from pain, waking up in the morning to her out of her silver armor and in her blue and yellow dress.

Ah! You're awake master. I do apologize. I moved you to your bed while you were out.

she bowed as she apologized, speaking with enthusiasm.