The story follows a boy soprano named Yutaka Aoi as he enters the world of competitive choir and approaches inevitable voice changes due to puberty.

As the school year goes by, he crosses paths with a famous Russian boy soprano who is already losing his high singing voice, and Yutaka's fellow choir members also face their own challenges.

Written and illustrated by Yuhki Kamatani, Shonen Note was serialized in Kodansha's seinen manga magazine Monthly Morning Two from November 22, 2010,[1] to May 22, 2014.

The story was developed from Kamatani's oneshot Octave (オクターブ) which was published in Morning Two in 2010; this pilot chapter is included in the seventh bound volume.

[5] Shonen Note was a Jury Selection for the 17th Japan Media Arts Festival in 2013; they described it as a work that "portrays the harmony of the passing days of life at school, in which boys and girls share both their joys and conflicts.