Synopsis
Kanba and Shoma are racing to save their sister, Himari, from a mysterious illness. After an incident at an aquarium, a simple penguin hat appears to temporarily stabilize her condition. To find a permanent cure, the twins must locate the legendary Penguin Drum by solving a series of complex riddles. This search leads them into contact with strange strangers and cryptic diary entries. As they piece together the puzzle, the brothers realize that changing someone else's fate might be the only way…
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