Reiko, a wealthy heiress, works as a junior detective at the Kunitachi police station. She tackles cases with Inspector Kazamatsuri, and often consults her butler, Kageyama, whose keen instincts help her solve difficult cases, but only after dinner.
EPISODE 1
Welcome to the Murderous Party File 1
Reiko attends a dinner party, but things take a dark turn when someone is murdered. Trapped with her friends, they attempt to uncover the killer among them. As secrets are revealed, tensions rises as they race to solve the mystery.
EPISODE 2
Welcome to the Murderous Party File 2; Here's a Message From the Dead: File 1
Kageyama devises an unorthodox plan to trap a criminal hiding in a luxury hotel, triggering an emotional revelation for Reiko and her friends. Reiko investigates a real estate tycoon's murder.
EPISODE 3
Here's a Message From the Dead File 2
Reiko begins investigating the murder of Kinue Kodama, the president of a real estate company. The clues, a trophy, a missing dying message, and cut curtain strings, offer no clear breakthrough. As Reiko grows discouraged, Kageyama appears.
EPISODE 4
Please Be Aware of Two-Timing Affairs File 1
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 but briefs.
EPISODE 5
Please Be Aware of Two-Timing Affairs: File 2; The Person Who Dropped It Is a Vtuber: File 1
When women of various heights are discovered at the crime scene, Kageyama suspects the murderer must have altered her appearances using elevator shoes; a delivery person is found dead with an item owned by his favourite VTuber.
EPISODE 6
The Person Who Dropped It Is a VTuber: File 2
Reiko and her colleagues investigate the death of a delivery man who fell to his death and find a connection to Vtuber Sakaguchi Kurumi, also known as Kuru Kuru-chan. While they investigate, fans online begin to blame Kuru Kuru-chan for the murder.
Kana Hanazawa
Yuki Kaji
Mamoru Miyano
Mitsuyuki Masuhara
Mariko Kunisawa
