Naoya Fukamachi is a university student whose ability to infallibly detect lies has left him friendless and isolated. But when he writes a paper about a strange festival he wandered into as a child, he catches the fancy of his folklore studies professor Akira Takatsuki, a handsome and eccentric man with a passion for all things mysterious. Soon, Naoya finds himself working as Akira’s assistant, helping him to interpret an array of unexplainable phenomena, from haunted objects and cursed effigies to urban legends. As this odd couple continues their investigations, however, Naoya realizes that his professor has had a few bizarre childhood experiences of his own…

Naoya Fukamachi is a university student whose ability to infallibly detect lies has left him friendless and isolated. When a paper of his piques the interest of his folklore studies professor Akira Takatsuki, a handsome and eccentric man, he soon finds himself dragged into Akira’s research. Now, as the assistant in charge of common sense, he must help his professor interpret an array of unexplainable phenomena…

Naoya, a university student who can infallibly detect lies, embarks on another investigation into mysterious phenomena with his eccentric professor, Akira Takatsuki. Their latest client claims that they’ve contacted the spirit of a missing classmate while playing the Kokkuri fortune-telling game. Afterwards, a famous actress comes to Naoya looking for advice about ghosts, and more of Takatsuki’s enigmatic past comes to light!

Kazuki Hoshino leads the easy-going life of a typical high school student--until the appearance of a new girl in his class turns his world upside down! Introducing herself with a promise to "break" Kazuki is abnormal enough to make an impression, sure, but why does she seem so familiar...?

Kazuki intended to keep Daiya's plan from coming to fruition with the Silver Screen of Broken Wishes, but things didn't go exactly as he expected. And after the shocking revelation about O's true identity, everything is about to change...

In the final volume of The Empty Box and Zeroth Maria, Kazuki makes his last stand against O to fulfill his vow to bring back the "zeroth" Maria-the real Maria. But what does fate have in store for them...?