Osaki asks the concourse participants to help him on a violin class. Kahoko, Len, Keiichi and Kazuki helps him. After a quartet performance, the children start to practice. Kahoko seems to be guilty and jealous of not being able to play normally. After class, Hino comes back to the room to get the other violin. Alone, she tries to play and it does not sound good. Len comes in and interrogate her about the awful sound. She runs out to the swing and cries. Near in the end of the episode, Len tells Hino that he thinks that Hino's violin is the only one she can play. But then Hino replies that there is no such thing. Len says to Hino that there are many things that he doesn't understand about her.