boys playing violins (?)

hi! i'm searching for a manga where there is a boy who save a drifted boy on the beach. the drifted boy doesn't remember anything, and so he starts living in the same house as the previous boy who saved him. the drifted boy is introduced to violin, as the other boy loves playing it, and the two boys begin connecting and playing the violin together. lo and behold, the drifted boy is actually a genius at playing violin. this starts a rift on their relationship, as the other boy is jealous of his skill. does anyone know the name of this manga?