This thing exists to make you uncomfortable, full stop. It's one episode of pure body horror wrapped in a comedy wrapper that dissolves the second you realize what's actually happening, and the pacing never gives you room to look away or contextualize what you're seeing. By the time you understand the ceremony, the show has already done its damage, that antenna isn't decoration, and Sayuri's family isn't quirky, they're participating in something genuinely wrong.
Sayuri exists in a household where the laws of normalcy have never applied. Her parents operate on a frequency only they understand, and she herself sports an antenna-like appendage jutting from her skull. No one questions why. No one needs to. This is simply how things are. When the moment finally arrives for Sayuri to undergo a mysterious ritual her family has been anticipating, the gathered onlookers hold their breath. Friends and relatives witness her carry out this bizarre ceremony with the deadpan certainty of someone completing a chore. The comedy cuts deep because no one bothers explaining what's actually happening or why it matters. The absurdity just is. This OVA operates in that strange pocket of animated comedy where psychological unreality becomes the baseline. It's funny because it refuses to justify itself, because everyone involved treats the impossible as routine, because you'll spend the entire runtime genuinely uncertain whether you're watching something profound or completely unhinged. Probably both.