Ao no Orchestra

Musical anime with the MC struggling with his past and finding ways to overcome the challenges to enjoy playing Violin again 

Both anime are centered around teenagers playing classical music. The MCs of both shows (Kousei Arima and Hajime Aono) have stopped performing music only to get back into it again. The dynamics between the male and female leads are also somewhat similar. The main difference between the two shows is that while Your Lie in April lays more into humor, Ao no Orchestra is a little more grounded and mainly features competitive aspects which are more typical of the average shounen. That said, both have their fair share of dramatic moments and sad backstories. 

The entire plot is very similar to Your Lie in April and also involves the same humor and drama -The protagonist is a prodigy in violin but has since dropped playing after his father, who also is his mentor, had a controversial affair and left the family. The situation is similar to Kousei's strict mother and after she died, a young Kousei got traumatized and stopped playing the piano -Everytime the protagonist, Aono, remembers that said trauma, he loses focus and couldn't hear notes, like Kousei -Akine is very similar to Kaori in that both are initially tsundere but later gets heavily involved in playing the violin and to love the protagonist -Both Kousei and Aono have rivals that harmonise their music -Kousei and Aono share the same personalities read more 

Main characters must overcome trauma in order to be able to enjoy playing music again. 

First of, both are based on music, both have a MC that is struggling, there setting is quite the same, both MC's are child competition winners ( you can say they are child prodigies but I believe they worked hard so...) . Although, its just different instruments and Ao no Orchestra has a much more refreshing ending to it (I believe, I'm not sure because it hasn't ended yet)