Venus Capriccio.

ヴィーナス綺想曲

Venus Capriccio (Japanese: ヴィーナス綺想曲, Hepburn: Vīnasu Kapurichio) is a Japanese manga series written and illustrated by Mai Nishikata about a tomboyish girl and her childhood friend who take piano lessons together. It was first serialized in the Japanese semi-monthly shōjo manga magazine Hana to Yume published by Hakusensha. It is licensed in North America by CMX Manga.