The Shadow Pavilion Taishō-era Japan. Behind the glowing lanterns, elegant tea houses, theaters, and narrow streets lies a hidden world of secrets, crime, and silent assassinations. Shizuka is known as a beautiful courtesan, but the identity is only a carefully crafted disguise. In reality, she works as an assassin for Genjirō, a powerful and influential man who secretly gives her assignments and chooses her targets. The only person who truly knows Shizuka beneath the mask is Ayame, her secret lover. Their relationship is hidden from Genjirō and from the society around them, forcing them to steal quiet moments together while Shizuka continues carrying out her dangerous work. But when Genjirō gives Shizuka a new assignment, she discovers that the target is connected to Ayame's past.

A chaotic ancient moon fox spirit who somehow ended up taking care of a human baby named Ren. Tsukikami is powerful beyond imagination, but acts childish, impulsive, and completely unfit to be responsible for anything. He lives in the forest, causing trouble, playing around, and pretending he knows what he’s doing. Despite everything, he refuses to leave Ren and keeps her by his side after deciding on a whim to “raise her.”