Wealthy heiress Reiko Hosho leads a double life as a novice detective. One day, an incident erupts at a birthday party she attends with friends from her college days. The victim is one of her old clas…

Mystery butler Kageyama concocts a peculiar plan to catch the criminal lurking in a luxury hotel, after which Reiko and her friends realize the hidden complexity of their own emotions. Reiko then tack…

While investigating the murder of a real estate tycoon, Reiko examines an erased dying message, a bloody trophy, and a cord yanked from the curtains. Without proof, however, she reaches a dead end...u…

With Kageyama as her chauffeur, Reiko and her friends visit a crowded summer festival, where a cracked smartphone is discovered. Its owner was poisoned in his apartment, and he died wearing nothing bu…

Women of differing heights are spotted at the crime scene. Kageyama suspects that elevator shoes disguised the murderer's appearance. After learning that the victim had scammed several women via datin…

After a delivery man falls to his death, Reiko and Kyoichiro investigate his connection to popular VTuber "Kuru Kuru-Chan," who is blamed for the murder by fans online. Kageyama assists in analyzing a…

A famous painter is stabbed in his own studio, pointing to his masterpiece wall painting "Sleeping Beauty" just before dying. Suspects include his art-jacking son, his second wife, and an art magazine…

Kageyama locates a secret passageway to solve the locked-room murder mystery. Upon encountering a deranged woman wielding a knife, Reiko is left with nowhere to escape. On the next case, a white-suite…

Journalist Ryota Ishiguro's body is found on the riverbank, but although the cause of his death is drowning, the body is dry. Reiko's investigations lead her to Shiho and Satoshi Kambara, a loving cou…

A woman's body is found in a bed of blooming roses at the prestigious Fujikura residence. The victim is Toshio Fujikura's fiancée, and the suspects include members of the family. Reiko, who happens to…

Reiko attends the wedding of Sawamura Yuri, who she cherishes like a younger sister. The groom is Hosoyama, a consultant for a family friend. When Yuri is attacked and gravely injured in her room duri…

Trouble strikes the Sawamura family again when Miyuki Sawamura is kidnapped and a ransom of 50 million yen is demanded. With no other suspects, Reiko sets her sights on Hosoyama. She takes Kageyama to…