Trigger Inc., more commonly recognized as Studio Trigger or just Trigger, is a Japanese animation studio
Studio trigger 1790
that was founded on August 22, 2011; by Hiroyuki Imaishi and Masahiko Ōtsuka, former Gainax employees, no less. Although the studio has assisted with producing various series, they also have established original works such as: Inferno Cop, Kill la Kill (Trigger's first television anime series), and Little Witch Academia

He's Our Fallen Angel was churned out by the studio, with direction by Akira Amemiya.