kuusen otome sky valkyries
空戦乙女 空戦乙女-スカイヴァルキリーズ- 空戦乙女☆ヴァージンストライク
A browser game released for smartphones by DMM. Originally an adult browser game known as Kuusen Otome Virgin Strike, releasing in November 2014, and having its service closed in December 2015. It was later restarted under its current title.