In/Spectre manga volume 16 features story by Kyo Shirodaira with illustrations by Chashiba Katase.

Kotoko teeters on the edge of defeat after having unearthed Rikka's plan to make the spectres lose faith in her as their Goddess of Wisdom, but there may still be time to salvage the situation. It all hinges on whether or not she can craft the perfect lie to deter any further investigation of the murder in the mountains and succeed in pacifying the vengeful giraffe spirit! Meanwhile, it seems like Rikka has no intention of disappearing again, so what could she be scheming now...?