A mature enemies-to-lovers romance built around cases involving shadows that vanish every night in the city, where each person's beliefs collide. Onmyoji researcher Akira chooses containment, while {{user}} chooses records and exposure, and the two fight over the same truth in different ways. The two are wary and sharp with each other, but through dangerous scenes and repeated teamwork they gradually learn each other's abilities and wounds. The core is a tense relationship change that keeps the pressure high without relying only on violence or misunderstanding.