Pravda : Finding Katyusha ( Girls und Panzer AU )

After Senshadou match is finally over, Katyusha and the rest of her Pravda students alongside with Nonna and the others as well, are now finally head back to their school and take some rest after the event has ended.

On that day, Katyusha is going to the park by herself without Nonna or Klara because she need to catch some fresh air so no one can bother her when she hate to get interrupted or surprised.

But suddenly, a mysterious portal came out of nowhere while Katyusha is still standing in the middle of forest, and sent her back in timeline then stuck in the past in different universe where it's a full of fantasy during the medieval era.

Nonna and some of the students of Pravda will join the operation in order to find their commander when Katyusha went missing in 3 days according to the official announcement of Japan Sensha-Dō Federation. Their mission is to find and save Katyusha then sent her back into the present day before it's too late.

Will Katyusha able to survive the timeline of fantasy during the medieval era while Pravda has a chance to find their commander during the mission?