The entire joke is that a kid bug inherits a biting shop and has to learn the family trade, played completely straight. It commits to the absurdity without winking at the camera, which is where the real comedy lives. The show trusts you to find it funny that a tenth-generation bottom-biting insect takes his apprenticeship seriously. This is the kind of premise that either makes you immediately get it or makes you wonder what you're watching, and there is no middle ground. For the people it clicks with, that commitment to pointless sincerity is everything.
Oshiri Kajiri Mushi XVIII is a ten-year-old bug with a family legacy: biting butts. Sounds ridiculous because it is, and that's exactly the point. He attends Biting School to master the ancestral craft his family has perfected over generations, all while pursuing his dream of taking over the family's Biting Shop one day. This is pure absurdist comedy stripped down to its essentials. Every episode cranks up the absurdity dial further, finding new ways to mine humor from the premise that a tiny bug's entire existence revolves around this one specific, ridiculous job. The comedy hits fast and hard in short bursts, never lingering long enough to wear out its welcome. What makes this work is the commitment to the bit. There's no winking at the camera or meta-commentary. The show treats butt-biting as a legitimate profession worthy of schools, training, and generational pride. That deadpan sincerity wrapped around the stupidest concept possible is where the laughs come from. Perfect for viewers who appreciate comedy that doesn't apologize for its own weirdness.