Kanade and Kyoya, who have transferred to Seiso Gakuin and joined the orchestra club, are surprised when Ritsu, the director, announces that they will be selected members of the National Student Music Competition. More than that, the other club members protested, especially cellist Yuto Mizushima, who was selected as a member for just one year, was unconvinced of forming an ensemble with someone who didn't know his abilities, so he decided to take a selection test. In front of Kanade, who is confused and troubled by a series of sudden events, there is a strange boy who tries to throw away the cello...