Stratos 4 Advance  

s4 ova2, S4A, s4ova2, Stratos 4 OVA 2, สตราโตส 4 แอดวานซ์, ストラトス・フォー アドヴァンス

Mikaze and her friends were unable to pass the Comet Blaster exams for unknown reasons. As a result, they returned to the Shimoji Island base. There, with three new Meteor Sweeper trainees present, they have been promoted to instructor positions. Meanwhile, more comets are approaching Earth, and the mystery surrounding the rift in the Cosmic Emergency Management Agency, as well as the alien parasites, is being uncovered.