Mighty Heart

Tenkawa Toichi is a normal, ordinary high school boy, except he has a secret identity - he is a member of the evil Phantom Organization, going by the alias Wolken. They are planning to conquer the Earth, but is being met with opposition from the so-called Angel of Judgement, Mighty Heart (Who, coincidentally, is a classmate of Toichi, Maishima Kokoro). Surprisingly, Mighty Heart is so weak that even Wolken's underlings can beat her easily, but they only figure out her ultimate weapon after Wolke