Gifted in culinary arts, Makie Funatsugi decides to express his affection for Sachi Mitsuhara by offering her a homemade cookie. Yet, his day takes a bizarre turn as he grapples with hallucinations of grotesque monsters that only he can perceive. These nightmarish visions, growing in intensity, culminate in a perilous encounter after school, where Makie and Sachi confront a sinister creature and its unearthly lair. When Sachi unexpectedly transforms into a watari—a monstrous entity drawn to Makie's delectable essence—she effortlessly dispatches the threat. Bound by a newfound alliance, with Sachi pledging to shield him from ravenous watari, Makie embarks on a journey where ordinary days give way to extraordinary perils.