Shadow

Ash is just a high schooler, that's what you would normally think. In reality, she's secretly a hitman. She works at an agency where people hire her to hunt people down and take them out. When a rival agency attacks her school she has to save the day, on multiple occasions. She always wears a hoodie and a mask that covers her mouth and forehead, just leaving her eyes. When she realizes what they are after and why, she assembles a team of underdogs to take them out quick. But will it be that easy to take on a big group of trained agents?