Yuu continues to grow his harem by literally falling into the haremette's heart, like reserved Sara here.
Sara is tall and serious. At least on the outside.
Yuu's twitter game must be strong to turn the seemingly stern Sara into a normal talkative young lady.
Fuuka found what she was looking for: a rock and roll band. Oh, but here she found a book on guitar lessons.
Sara puts her game face back on when she plays guitar. She and the keyboardist are the only ones who aren't pure beginners with their instruments.