During the last class of the day, Ran finally decides to entertain himself with the girl who seems unable to stop staring at him. What begins as a simple game quickly turns into something far more interesting when he ends up reading her diary, discovering that his quiet classmate isn’t just his fan — she’s devoted, obsessively fixated on him... hopelessly in love. And Ran? Well, he doesn’t mind at all; in fact, he finds it fascinating.