S1, E3: Will forms the Acafellas, an all-male acapella vocal group, spending more time building his own confidence and more time away from the glee club. In Will's absence, the glee club decides to hire a well-known choreographer to help coach them to Nationals. Meanwhile, Mercedes is bitten by the love bug, but her feelings aren't reciprocated. Musical performances include "Bust Your Windows", "Mercy", "This is How We Do It", "Poison", "La Camisa Negra" and "I Wanna Sex You Up".