Your Lie in April Vol. 7 (manga)

With Kaori nowhere to be seen at the gala concert, Kosei is forced to perform alone. As he plays, he confronts painful memories and finds a link connecting him to the audience, his late mother, and even himself. Meanwhile, Tsubaki struggles to find truth within her complicated feelings for Kosei—is he like a little brother to her, a childhood friend, or something more … ?