Okitegami Kyouko no Ryokouki

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)

The ninth instalment of the Boukyaku Tantei Series. The forgetful detective, Okitegami Kyouko, is arrested as a suspect in a robbery-murder case. She was found asleep at the scene, clutching the bloody murder weapon, and had forgotten her memories of the incident. When Kyouko-san offers to investigate the case from inside her cage, she is confronted by Hitaisei, a strong police officer nicknamed "the False Accuser". As he struggles with his pride as a police officer, he chooses to ask for the help of the "forgetful detective expert", Kakushidate Yakusuke...? (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.