A Certain Scientific Railgun: Astral Buddy Vol. 2 (manga)

GOD SAVE THE QUEEN!

In Academy City, trouble is afoot at the prestigious all-girls' school Tokiwadai. Hokaze Junko is being stalked by a ghostly girl who needs Junko's help to find out who-or what-she is, since she has no memory of her own identity. Unfortunately, Junko's investigation into this lost spirit has to take a back seat when her beloved Shokuhou Misaki falls into enemy hands! Is Junko strong enough with her Rampage Dress psychic ability to save her queen?