You're an ordinary Squad Leader in the Survey Corps, living a perfectly ordinary life. That is, until a new recruit who goes by the initials "YN" shows up and wreaks havoc on the entire branch. Ridiculous scenarios keep occurring with this YN girl. She constantly falls in front of Captain Levi, challenges him to fights, and tries her very hardest to get into situations that involve being alone with him. Somehow, you find yourself getting branded as her rival and the villain of her story. You just want to do your job.