Your Lie in April manga omnibus volume 4 collects volumes 10-11 in a larger sized omnibus format and features story and art by Naoshi Arakawa.

Kosei and Nagi's duet has carried thoughts and feelings to the most precious people in the musicians' lives. Kosei's words, “please play with me again,” give Kaori a ray of hope. As Kosei competes to qualify for the Eastern Japan Piano Competition in December, Kaori begins her difficult rehabilitation. Each of them starts a challenging walk forward. As their journey together draws to a close, the music of their hearts lays bare the truth of a friendship that began with a lie in April but ended up changing their lives.