“Now that I want to play Spring Dawn, Grandpa's sound is coming back to me…?” Through their tour, Setsu connects with the “roots” of his sound and performs Spring Dawn with the other members of STC in their final show. As its melody transforms at the height of their performance, will it move the heart of the film director, Alexei?! Meanwhile, Setsu's older brother, Wakana, makes a big splash worldwide as his anime theme song, Kaede, becomes a major hit. However, his feelings are far from at ease when he gets word that Setsu has performed Spring Dawn…?