K-ON!! Season 2 episode #21
Pictures are going to be taken for the graduation yearbook and Yui struggles with her hairstyle as she wants the perfect picture for her last year.
On a morning Yui's struggling with her hair before the mirror. There's going to be pictures taken for the graduation yearbook soon. Ui takes her hairpin so Yui can experiment on her. Though she forgets to take it back and let Mugi experiment on her in class until Ui gives it back to her.
Yui thinks her bangs are too long so she decides to cut them of a tiny bit. But when she does she sneezes and cuts off too much. They all try to fix her up a bit and tell her she looks cute. Eventually they all have their pictures taken.
At the end Mio decides to turn down her recommendation because she wants to study together with her friends. So they all turn in their senior questionnaires telling they want to study at Mugi's all-girls college. So now Yui's and Ritsu's questionnaires are finally accepted by Sawa-chan.