Capella no Genkou

Aoiro Hitsuji, a struggling musician, has a second career as a "painter." While he receives regular art commissions, little does anyone know that the paintings are actually created by his high school friend, Yagi, a reclusive shut-in who can't leave the house. While his music career remains stagnant and uninspired, Sei Iro comes across a new painting by Yagi one day that deeply moves him. This sparks a determination to approach his music with renewed effort. However, when the painting goes viral on Twitter, the two friends' destinies begin to undergo a significant divergence. (Source: Hakusensha, translated)