Okitegami Kyouko no Konintodoke

The fifth instalment of the Boukyaku Tantei Series. With her resignation letter tucked into her breast pocket, Inspector Hatopa was shaken. Her last case is a drowned body found floating in a park fountain. However, due to its inexplicability, she is forced to investigate in cooperation with the famous forgetful detective, Okitegami Kyouko...... A detective wishing to quit and a workaholic detective. A strange tag team takes on the mystery! (Source: Kodansha, translated)

The seventh instalment of the Boukyaku Tantei Series. The famous detective known as Okitegami Kyouko loses her memories whenever she sleeps. She solves every case she takes on the same day, but today she receives a difficult case from a troubled detective. For some reason, she is called to an amusement park instead of a crime scene. The request is to clear a huge escape game faster than a suspect in a case......? She is beautiful, fashionable, and loves money. A time-constrained mystery with the forgetful detective, Kyouko-san! (Source: Kodansha, translated)

Twenty-five-year-old Kakushidate Yakusuke suffers from the fate of constantly stumbling into various crime scenes and ending up being the main suspect. His last resort: Okitegami Kyouko the "Quickest Detective." However, Kyouko suffers from a strange case of amnesia; whenever she falls asleep, she forgets everything that happened the previous day, making her solve the mysteries within one day. Note: Includes 4 extra chapters.