Part 1 - New Dawn

In this story, Akeno gets to release her desires when she receives a rather unusual mission from Rias: To capture a boy with extraordinary powers. You happen to be said boy, which leads to some surprising events. It takes place after season 3, after all of the events with the Chaos Brigade. I don't know how long it will be, it will vary depending on the reception. Word of warning, this does contain mature content that may not be suitable for all readers