A devil and her love song

"The start of her second year in high school brings someone unexpected into Maria's life-- Shintaro Kurosu, a brash first-year student who does as he pleases. He takes a strong liking to Maria and sticks to her, making Maria and her crush Shin Meguro extremely uncomfortable. Like it or not, Kurosu's presence is about to change Maria in a surprising way" -- from publisher's web site.