Resonant Blue

I'm so frustrated that I can't express this feeling you give me.
The color of this feeling you gave me must be...
Nagi, a high school girl who loves the sound of the human voice, and Michiru, a classmate with a clear and beautiful voice. It started as an exchange of notes in class that no one else knows about. Clumsy, but honest. The title story Resonant Blue depicts the relationship between two girls.
This is the author's first long-awaited yuri short story collection.
(Source: Comic Medu, translated)