Okitegami Kyouko no Chousenjou

The second instalment of the Boukyaku Tantei Series. A young man, Oyagiri Mamoru, works as a security guard at a museum. Whenever he visits the area he guards, there's always a beautiful white-haired woman who stops in front of a particular painting. She is Okitegami Kyouko, also known as the Forgetful Detective. They were only supposed to be a guard and spectator until a number of tough cases involving art occurred—. (Source: Kodansha, translated)

The fourth instalment of the Boukyaku Tantei Series. Kakushidate Yakusuke is a young man with a history of false accusations. All kinds of misfortune befall him, and now a girl has fallen on top of him! A time-constrained mystery about a forgetful detective who loses her memory every time she sleeps! A junior high school student attempts suicide by jumping off a building. A twenty-five-year-old young man named Kakushidate Yakusuke is present at the scene, but due to his innate tendency to be falsely accused by others, he is made a suspect. A suicide note, allegedly written by the girl, is left at the scene. Will Kyouko-san be able to clear the suspicions and solve the case? (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.