7-jikanme no Note

is a japanese manga series written by Shima Tokio. It began serialisation in the January 2010 issue of Manga Time Kirara Forward.

The series was released under 4 volumes from November 2011 to August 2013.

Synopsis
Yohei is in the Woodwinds Orchestra at his high school where he plays the clarinet as one of the few boys in the group. The president of the group is Azumi who also happens to be Yohei's first girlfriend. Azumi has never had a boyfriend before, and the couple has many awkward moments as their relationship is still fresh. With both Yohei and Azumi acting a little shy with each other, being intimate is difficult but their love for each other makes them braver.

(Source: MU)