Associate Professor Akira Takatsuki's Conjecture Novel Volume 2 was written by Mikage Sawamura.

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!