Tiger & Bunny, Vol. 4 — Mizuki Sakakibara

Superpowered humans known as NEXT appeared in the world 45 years ago. Some of them fight crime in the city of Stern Bild while promoting their corporate sponsors on the hit show HERO TV. The people love their superheroes, even if they don't completely understand them, and not all of the NEXT use their powers for good.

The heroes face down the deranged NEXT killer, Lunatic. Lunatic's vigilantism has the city on edge, and the heroes find themselves having to convince everyone that NEXT are working for the good of Stern Bild City. Lunatic is in the wrong, but there is much more to the madman than anyone knows…