Associate Professor Akira Takatsuki's Conjecture, Vol. 5 (light novel)

During the summer of his second year of university, to find out the truth behind his uncanny ability to detect lies and the œFestival of the Dead, Naoya decides to head out towards the old village of Koyama in Nagano with Takatsuki and Sasakura. It was a village he visited many times as a child, the village where his beloved grandparents lived. But now, it's no better than a ghost town. Reconnecting with his cousin, Naoya then hears of the ominous saying his late grandmother whispered until the day she died: œNaoya was taken by the mountain gods. Arriving at the village where, according to the rumors œthe dead walk, the group begins their investigation. But suddenly, Naoya and Takatsuki are once again invited back to that midnight festival where it all began¦