Unable to sleep, second-year middle schooler Yamori Kou goes outside alone for the first time and meets the beautiful vampire, Nanakusa Nazuna.
"Stay up until you're satisfied with today, boy."
The nights he spends staying up late alone with Nazuna begin to change Kou's fate greatly.
"This is the story of how I fell in love with Nanakusa Nazuna."
For everyone who spends sleepless nights, a late night boy-meets-girl!