Kousei, Tsubaki & Watari sit down to watch Kaori's performance which ends up being completely unlike anything else they've seen. Kaori just seems to have a way with music completely different to how Kousei was taught.

Kousei and Kaori arrive just in time for the competition, however without a chance to practice the piece how will Kousei be able to perform? And how can he survive on stage with the memories of his mother still haunting him?

The Maihou Music Competition has started and Kousei is starting to feel his fears catching up with him. At the same time some old rivals have appeared and are set on competing with Kousei.

Kousei, Tsubaki and Watari visit Kaori in the hospital, but she insists everything is fine. Tsubaki reflects on her past with Kousei and considers if she has romantic feelings for him. Meanwhile, Kousei makes an important decision about his future.

Knowing her time is limited, Kaori undergoes a risky operation, hoping to have the chance to play with Kousei on stage one more time.

The OVA focuses on Kousei, Emi, and Takeshi when they were younger, showing their troubles during their competitions and the beginning of their rivalry.