Haruru Shirosaki is a perpetually occupied girl, as her father holds a significant post as a director. Her confidant is Mami. Haruru attends a school for young women located opposite a school for young men. One fateful day, she glimpses a boy peering through the window of the adjacent boy's school. Upon returning home from her classes, to her bewilderment, the same boy who had caught her eye earlier materializes claiming to be her butler. Is this a mere hallucination or is it reality?