Penguindrum(2011)

Let's initiate the survival strategy.

Penguindrum is a surreal anime series that follows siblings Kanba and Shōma as they race to save their sister Himari from a terminal illness. When a mysterious spirit inhabiting a penguin-shaped hat miraculously restores her health, it demands an impossible price: the brothers must locate the legendary Penguin Drum. Aided by three peculiar penguins that only they can see, the brothers navigate a strange world where destiny and chance collide. The series blends magical realism with psychological depth, unraveling dark secrets about their family's past while exploring themes of love, sacrifice, and fate. As Himari's condition remains fragile, the brothers discover that saving her may require confronting truths far more unsettling than any supernatural threat.