Larva is a South Korean animated comedy series built around two larva characters, the grumpy Red and the cheerful Yellow, living under a storm drain. The show uses almost no dialogue, so Red communicates through squeaks, grunts and repeated cries like oi oi oi. Short clips of his outbursts spread widely as reaction audio on social media, where the red larva meme became shorthand for irritation, alarm and over-the-top complaining. Its lack of real words makes it easy to reuse across languages and edits.