"Rhyme" is an electronic brain online game using a virtual world as its setting which Rhymers are going crazy over. Aoba shows no interest in it, thinking that it would be nice to just live peacefully with his grandmother. But the disaster that will shake up those peaceful days has already begun...

Our protagonist protects a man from an out of control car, but gets hit and loses his memory in the process. The man he saved happens to be the owner of a jazz bar, sótano. Out of sympathy for his hapless savior, the man decides to set him up with a job and a place to live.