After Reincarnation, I Was Turned Into a Slave Maid by the Princess

I was supposed to be a hero who would save the world with invincible power. But before that setting could take place, due to an accident…… “I never thought you’d be so eager to be bullied that you’d choose such a body?” “That’s not it! This is all a misunderstanding!!!” Being treated as a maid by a black-haired girl, I thus embarked on my journey. — Description from novelcodex.org