Shingeki no Kyojin: Lost Girls is made up for three stories.
The first is titled “Wall Sina, Goodbye” and follows Annie a day before the Survey Corps go on a mission to find a lost girl named Carly. Annie gets separated during the search mission and uncovers a wide-ranging criminal ring within the Stohess District which could affect her secret mission to find the Coordinate for Paradis.
The second story focuses on Mikasa and is titled “Lost in the Cruel World.” The story takes place in an alternate universe where Titans never existed, so she grew up with her parents by her side. Mikasa ends up meeting Eren Yeager despite the change, and it follows the start of the two’s friendship.
As for the third story, “Lost Girls” sees Mikasa and Annie come together in a brief encounter during their military training days. The girls talk about their training regimes, and they even broach the sensitive topic of why they each chose to join the military.
Download Attack on Titan OVA – Lost Girls from below mirrorsDownload OVA 01 from Mega
Vol. 24: Part 01 Annie’s story I (8 Dec 2017)
Vol. 25: Part 02 Annie’s story II (9 Apr 2018)
Vol. 26: Part 03 Mikasa’s story (9 Aug 2018)