Synopsis

Ritsuka Uenoyama is feeling uninterested with everything – school, basketball, and even his beloved guitar playing. All that changes when he finds his favorite hiding spot filled by a strange boy named Mafuyu Sato, holding a broken guitar. At first, Ritsuka finds Mafuyu a bit odd, but when he asks Mafuyu to sing on a whim, the song affects him deeply. (Source: SuBLime)

Story emphasis added for better comprehension.