The notorious Yoshiwara red‑light district has been seized by a new menace: the incense known as "Aizen Kou." This fragrant powder can compel anyone who smells it to fall instantly in love with the first face they encounter. Though banned for its overwhelming potency, the drug was presumed vanished from Yoshiwara"s alleys; yet it has resurfaced within its walls, now gripping the entire district.
Among those entranced is Tsukuyo, the stoic captain of Hyakka. The first figure she sees after inhaling the scent is none other than Gintoki Sakata, the fearless leader of the Yorozuya. Though everyone else remains unaware, Tsukuyo had already harbored feelings for Gintoki. With those emotions magnified by the incense, she must fight her newfound weakness and ally with the Yorozuya to restore normalcy.
