Date A STrike

The manga revolves around the AST, an elite unit dedicated to battling spirits, and is linked to both the "Date A Live" book and anime. Its protagonist, Okamine Mikie, admires Tobiichi Origami, her supervisor in the team, and may feel romantically towards her. However, it seems Origami is not interested in her. One day, they investigate an explosion that they believe was caused by a spirit, but find out that a new transfer student, Ashley Sinclair, was responsible.