Behind His Scarf follows the two new students of Kaiun High School's third year. Sakura is a quiet, hard working girl with golden hair; whilst Lucifer is a rebellious male with a terrible temper. Their worlds become entwined when Lucifer finds out Sakura's secret and forces her to go out with him. Mortified, at first, by the agreement, Sakura learns the truth about Lucifer and begins questioning her own past. Discovering the kinder side of Lucifer, Sakura gets dragged into his world and find much more than she bargined for.