One summer afternoon, Saeki is invited by his friend Maeda to go to an old book festival. . . By chance, the self-proclaimed genius scientist Nanaban asked him
One summer afternoon, Saeki is invited by his friend Maeda to go to an old book festival. . . By chance, the self-proclaimed genius scientist Nanaban asked him to search for the lost book! A mysterious incident happens there!？It's that kind of story!