After roughing up some delinquents, Harima dashes to school just in time for a surprise English test. But when he notices Tenma forgot to write her name on her answer sheet, things get complicated fast. And that's just the beginning of this bizarre school day!

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?