The 22-episode TV anime Your Lie in April is available on Crunchyroll.
It was previously adapted into a 22-episode TV anime produced by A-1 Pictures in 2014-2015, a live-action film in 2016, and a straight stage play in 2017.
The original manga was serialized in Kodansha’s Monthly Shonen Magazine from April 2011 to February 2015, then compiled in 11 tankobon volumes.