"Isn't love just letting reason make way for a racing heart?"
Fujiwara Yukie, an "ordinary high school girl" in Class 2-B at Teitan High School, lives by one rule: stay away from anything dangerous, especially detectives.
But fate has handed her a script way over her head:
Her best friend is Ran Mouri, a karate champion whose daily life is surrounded by cases;
Her deskmate is Sonoko, heiress to the Suzuki Conglomerate, part-time romance advisor and gossip reporter;
The transfer student, Masumi Sera, keeps using Jeet Kune Do to make her analyze "why your boyfriend's heart is beating strangely today."
Even more absurdly, she finds a cufflink shaped like a crow at an amusement park and gets caught up in the Black Organization's shadow;
At Twilight Manor, she runs into a British gentleman who seems to have a pocket watch for a soul, and gets handed a box of burnt "hemostatic bread."
Saguru Hakuba, son of the superintendent general of police, is a perfectionist who measures time to 0.001 seconds. His greatest failure in life is this:
Whenever he is around Fujiwara Yukie, his pocket watch starts losing accuracy because his heart beats too fast.
