Haruki is entranced by Setsuna's singing on the rooftop, and plots to get her to join the Light Music Club no matter what.  But she hates standing out, so convincing her is incredibly difficult.  Meanwhile, the club has an even bigger problem.  The elite student from Music Room 2 he was trying to persuade to join his club as the keyboard player isn't a member of the Music Class, it's a mysterious person whose class and identity are a total unknown.
Yeah. I believe them when they 
say they weren't using it,
Ja, ich glaube ihnen zwar, 
dass sie ihn nicht benutzen,
Sí. Les creí cuando 
dijeron que no lo usaban,
Sí. No mentían al decir que no la usan,
Oui, je ne pense pas qu’ils utilisent 
cette salle eux-mêmes,
Sim. Acho que é verdade que
nenhum deles estava usando,