Melody of the Boundary, Vol. 1

Kyousuke and Kai are two musicians ready to take the world by storm. However, the day before their big debut, Kai passes away in a terrible traffic accident. Three years later, Kyousuke has given up music entirely and fallen into a deep depression when his deceased partner appears before him like nothing ever happened. Kai helps his friend remember the magic of music, encouraging him to start playing piano again. Can Kyousuke overcome his grief and bring color back into his world once more?