Dai Ni Ongakushitsu e Youkoso!!

Masato returned to Japan after 3 years in Vienna with his parents. Immediately after his first day of class at Yonamori Gakuen, his osananajimi Kana grabbed his hand and dragged him to the second music room in the old school building. She welcomed him to the music club, which everyone in the school dismisses as just a group of weird kids playing together. What will happen to his new school life?