Streaming: Funimation
Episodes: 12 (The first episode is double-length)
Source: Light Novel
Episode Summary: Note: The first episode is double-length. I will endeavor to keep the summary concise.
Trouble seems to follow Kimihiko wherever he goes, so when he’s nabbed off the street and forced to carry a mysterious attaché case onto a flight, it feels like par for the course. But this is no ordinary plane ride – mid-flight he meets Siesta, a self-proclaimed detective, and involuntarily becomes her sidekick as she’s summoned to the cabin to help solve an… issue. There she faces off with an individual intent on hijacking and crashing the plane. Siesta correctly identifies that this man, code-named “Bat,” was put up to this by a certain organization, but that doesn’t stop him from brutally attacking them both with an augmented appendage. As it happens, the attaché case contains a special gun used to defeat this adversary. The fact that Kimihiko was forced to carry it onto the plane was all a machination on Siesta’s part.
After they land Kimihiko assumes his odd adventure is over. However, Siesta has other plans. Inviting herself into his home, Siesta eventually learns that Kimihiko’s school has been experiencing an odd rash of student disappearances that seem to be related to the Hanako-san urban legend. She poses as a student to attend the cultural festival, and manages to identify the real root of the problem. After all this, Kimihiko is still reticent to become her official sidekick, but an offer of protection pushes him over the edge. Yet their adventures are not all sunshine and roses, because… the detective is already dead.