Thinking that someone was trying to break in, they take the offensive side and open the door to only find a young girl. Isabel risked going to the surface to release an injured bird only to be cased down by thugs. With the help of Levi and Farlan, Isabel avoids them.
The ova is based on the manga spin-off A Choice with no Regrets; however, they changed some elements of the story in the ova. Levi found Isabel alone, and took her in thus is why she calls him her brother.
Watch ACWNR : http://www.moddb.com/groups/humanitys-strongest/videos/shingeki-no-kyojin-a-choice-with-no-regrets
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