Teinenpi Shoujo Heidi

Heidi has one question that she refuses to stop asking: what exactly does "low fuel consumption" mean? Her relentless curiosity sends her from one familiar face to another, demanding an explanation while Grandpa, Peter, Clara, and the rest of her Alpine world struggle to satisfy her.

The more seriously everyone tries to answer, the more absurd the conversation becomes. Heidi's innocent persistence turns a simple phrase about efficiency into a running comedy of misunderstandings, exaggerated reactions, and increasingly desperate explanations.