Pigs Say Oink Oink! Cats Say Meow! Frogs and Kappas Say Ribbit Ribbit Ribbit!

It's school trip time! Tenma hopes to sit next to Karasuma on the bus, but Harima snags the seat first. A bathroom break mix-up causes Harima to board the wrong bus, leaving the coveted seat open again—but can Tenma seize the opportunity?