Wall Sina, Goodbye (Visual Novel)

Wall Sina, Goodbye is a visual novel by Hiroshi Seko. It was first released on December 18th, 2013 in Japan bundled with the sixth anime Blu-ray. The story was also included in the novel Attack on Titan: Lost Girls which was later adapted into a manga of the same name.

Chapter One
Annie Leonhart awakens in the Military Police Brigade barracks in Stohess District, depressed about tomorrow's mission in which she must infiltrate the 57th Survey Corps Extramural Expedition and capture Eren Yeager. She thinks back to the aftermath of the battle of Trost District one month ago, recalling the many trainees who died partly due to her actions.

Chapter Two
In the barracks, Annie waits for her roommate Hitch to return from the showers. Once Hitch arrives, she asks her to report her as sick tomorrow. Hitch agrees on the condition that Annie takes care of a task she had been assigned. Carly Stratmann, daughter of Elliot G. Stratmann, chairman of the Marleen Company, had been reported missing and Elliot wants her found. Annie agrees to take the job. Annie considers taking Hitch's advice and submitting a report saying she could not find her while in reality not looking at all, but Annie decides to take the job seriously in order to distract her from the anxiety of tomorrow's mission.