<P> Finally Kaori is discharged and back to her happy, crazy - self, inviting Kōsei to play at a Gala with her . However, Kaori fails to show up on the day of the Gala, and as her health worsens, and she begins to give up on life . This time, Kousei is the one who inspires her after playing a duet with Nagi Aiza, the pianist sister of a fellow rival of his . After shedding tears and listening to it, Kaori opts for a risky surgery that will kill her if it fails, just so that she can play with him one more time . </P> <P> Much to everyone's sadness, Kaori dies due to the surgery, but leaves a letter to Kōsei which is given to him by her parents at her funeral in which she eventually states that she was in love with Kōsei the whole time, and she lied that she had a crush on Watari to get closer to him while not hurting Tsubaki's (who also has a crush on Kōsei) feelings . This was her lie: a lie she told in April . </P> <Dl> <Dt> Kōsei Arima (有馬 公 生, Arima Kōsei) </Dt> <Dd> Voiced by: Natsuki Hanae (Japanese); Max Mittelman (English) & Piano performance by: Tomoki Sakata </Dd> <Dd> Played by: Kento Yamazaki (live - action film); Shintarō Anzai (stage play) </Dd> <Dd> Kōsei is a former child prodigy in playing piano, dubbed the "Human Metronome" for his near - inhuman mechanical accuracy, a product of his mother's overly strict methods of teaching . His ability to play the piano with unparalleled precision led him to win many competitions across Japan and even be invited to play abroad . When his mother died, the resulting psychological trauma caused him to be unable to hear the sound of his piano playing, and he gave up on it . Two years later, he takes up the piano again after being convinced by Kaori Miyazono to become her accompanist . Influenced by her emotional and unrestrained playing style, Kōsei eventually finds himself falling in love with her . He, however, does not confess his feelings due to her liking his best friend, Ryota Watari . </Dd> <Dd> It is later revealed in Shigatsu wa Kimi no Uso: Coda, a side story from Kōsei and Tsubaki's childhood, that his inspiration for playing so beautifully in his first competition was to cheer up Tsubaki after the passing of her grandmother . </Dd> </Dl> <Dt> Kōsei Arima (有馬 公 生, Arima Kōsei) </Dt>

Who plays the piano in your lie in april