Nikki Asada is the illustrator of Sound! Euphonium.
Sound! Euphonium (light novel)
By Ayano Takeda, Nikki Asada
After a terrible experience in her past at the National Music Band Competition, Kumiko abandoned music once and for all. She starts her first year at Kitauji High School, she finds herself being roped back in. But their school's band is hopeless. There was a time where they had placed well in nationals, but now they can't even make it past their regional qualifiers. In the midst of all of this, Kumiko meets the last person she'd ever want to see again, Reina. Will Kitauji High manage to pull itself together with the day of the concert drawing ever closer?!