When high school girl Himari Takakura escapes the clutches of death thanks to a quirky spirit inhabiting a penguin hat, she gets a new lease on life - but theres a catch. In order for her to stay alive, her twin brothers with the help of three penguins must track down a strange object called the PENGUINDRUM and in doing so, delve into the mysteries of their very existence.

PENGUIN POWER

Twins Kanba and Shoma live with their terminally ill little sister, Himari. One day, they visit the aquarium, a place full of warm memories for Himari, but she suddenly falls ill—and dies! At that very moment, a voice cries out, “Survival Tactic!” and Himari, wearing a penguin hat, comes back to life…?!