Morobito Kozorite ~Joy to the World! The Lord Is Come~

This is the debut game by CLAPWORKS. Kyouya attends Tsukiyama music school, but he has lost sight of why he plays the violin. He spends his days with his cheerful osananajimi Mayuko, his carefree best friend Jousuke, his kouhai who considers him her rival Yukari, and his senpai Shiki, who is a genius composer but has zero life skills. On one chilly autumn day, a girl with an angelic voice moved in next to his room at the dormitory. After meeting Kano, he gradually remembers the joy of music that he had forgotten.

[From Hau~ Omochikaeri!]