Solfege

Solfege (ソルフェージュ, Sorufeeju) is a one-shot manga series written and illustrated by Fumi Yoshinaga. The series is licensed and published in English in North America by Digital Manga Publishing.

Plot
Kugayama is a gifted music teacher, but a man with little ambition or desire. Born to a wealthy and prominent family, Kugayama passes his days simply going through the motions and existing. When ex-student, Azuma Tanaka, requests his help in studying for a prestigious music school's entrance exam, his budding youth and enthusiasm invoke a passion in Kugayama that he has never experienced before.