Aono, Ritsuko, and Haru. Confused by their fluctuating feelings, the three of them continue to act as usual. Aono receives help from Ritsuko and Haru in his studies and finishes his final exams. The orchestra club's next performance is a Christmas concert held jointly with the choir club. Not only will the choir members sing along with the orchestra, but the orchestra members will also join in on some songs. Aono is embarrassed to sing in front of people and struggles with the unfamiliar songs. Then, a dignified voice resonates. Who is that voice?