Kouya no Kotobuki Hikoutai Gaiden: Oozora no Harukaze Hikoutai

Other name: 荒野のコトブキ飛行隊 外伝 大空のハルカゼ飛行隊

Genres: Action, Adventure, Military

Status: Ongoing

Summary:

A short spin-off anime released on "Kouya no Kotobuki Hikoutai: Oozora no Takeoff Girls!" game app and YouTube.