Seiko gets suspended for throwing hands at her best friend's bullies, steps on a train to Nagasaki, and walks directly into a murder case she has zero obligation to solve. She doesn't wait for permission or explanation. She moves. Chuta matches her energy the entire way, and the two of them snap at each other in that way that only works when you're both too stubborn to look away. The mystery itself cracks open clean enough to matter. One episode is not enough time to finish this story, but it is enough time to know why you would follow these two anywhere.

Seiko has been suspended from school after she beat up the older students who were bullying her best friend. With time on her hands, she sets off on a trip to Nagasaki, only to find herself pulled into a murder mystery centered on a killing aboard a train. Adapted from a series of young-adult novels for women by Hiroyasu Yamaura, this single-episode 1990 OVA mixes detective mystery with action, adventure, comedy, drama and romance.