Hange Zoe was conducting an experiment while Levi and the commander where watching everything was going well until Hange did something and then everything went white for all of them. They got blinded and went unconscious, when they woke up they were in a different place and time line,2026. A young beautiful women was looking at them confused as she had just seen them appear out of nowhere…that woman is y/n. She ends up helping all three of them taking them to her place as they live together Levi