When (Y/N) is transferred to a different regiment, she ends up crossing paths with Humanity's Greatest, aka Levi Ackerman. She becomes a Captain for the scout regiment, and works closely with him... Every. Day. Although this may seem like a dream to most, the two don't seem to get along. They are both harsh, emotionless, and blunt people. And most times, they're at one another's throats. But when Erwin tells Levi of (Y/N)'s past, he starts to reconsider his opinion on his second in command soldier.