In chapter 46 pages 6 - 8, Yuu is depressed and sitting on the couch looking at his rejection letters from his auditions to be a child actor. He states that she wouldn't understand since she only takes on leading roles that is when she points out that it isn't that she is a genius actor and only takes on the leading roles but she has put in hard work and shows him how she is often cast as the understudy and then tells him that he shouldn't care what others think about him but what he thinks of himself. I understand that this is all being said to Sakura as a means to cheer her up and it might not have ever happened but Yuu says it as if this were a memory from his childhood that helps him cope with constant disappointment.