Episode 4: Yuu confesses the truth about her powers, convinced Ayumu will hate her for being a monster. Ayumu won't have any of it, and swears to stay by her side no matter what comes their way.
Episode 11: Yuu speaks after Ayumu told her not to leave again. Not write, SPEAK. Not just one sentence, about 5-6!
Episode 12: Ayumu takes Yuu's powers temporarily, with the help of a machine Doi-sensei just happens to have brought along, to allow her to join in with all the other girls singing. Then when the machine's batteries run out Yuu stops singing until Haruna tells Yuu to hold her hand so she can use her powers to help Yuu keep going
