Inumaru just does whatever he wants, and nobody can stop him. Yamada shows up ready to be a real teacher, and gets immediately demolished by a four-year-old with no pants and zero self-awareness. The comedy isn't trying to be clever, it's just watching a kid be exactly as chaotic as kids actually are, and a teacher slowly accept that professionalism doesn't work on toddlers.
Four-year-old Inumaru has a simple philosophy: pants are optional. Every day at kindergarten, he strips away the lower half of his outfit and goes about his business with complete confidence, leaving his new teacher Tamako perpetually flustered. She arrived expecting a straightforward job managing young children, but Inumaru's relentless commitment to his pantless lifestyle transforms every routine activity into absolute chaos. What starts as bewilderment quickly becomes Tamako's crash course in toddler logic. Inumaru doesn't see his behavior as rebellious or strange; to him, it's perfectly sensible. His matter-of-fact attitude toward his wardrobe choices baffles everyone around him, yet somehow he remains unbothered by the constant reactions he provokes. Caught between enforcing basic decency standards and accepting that some kids simply operate on their own wavelength, Tamako must survive her days at this kindergarten. Short bursts of pure absurdist comedy follow as she navigates the unpredictable world of preschool, where one determined child's commitment to going half-naked can derail any lesson plan.