If you're looking for manga similar to Ongaku to Manga to Hito, you might like these titles.
Miya made a bold high school debut in an attempt to change from her once *infamously* boring self. She gets involved with another girl named Hiyo, and is convinced to enter the beautiful world of Japanese traditional instruments. Inspired by a mesmerizing live performance, Miya ends up joining Hiyo's quest to establish a "Japanese music club" and form a Japanese instrument ensemble.
Guitar Shop Rosie is a guitar repair store run by two brothers, Angus and Malcolm, who aren’t good at making money, but love AC/DC and rock music.
Apartment building clerk by day and electronic music composer by night, Kiyosumi enjoys his "clean and simple" existence free from relationships and distractions. One day he gets an unexpected admirer as a distressed female neighbor destroys both his room's window and his solitude...