Kizudarake no Piano Sonata

Luna Tsukitsuba, a beautiful, intelligent, and athletically gifted girl, endeavored to be better than anyone else in badminton. One day, in the face of overwhelming raw talent she experienced her first lose. After that crushing defeat, she is saved by a piano melody from a friendless girl in her class nicknamed the "Ghost of the Music Room."

(Source: Shounen Jump Plus, translated)

Note: Includes two extras.