A forbidden love incense spreads through Yoshiwara, making anyone fall for the first person they see. Tsukuyo falls victim to it — with Gintoki being the unlucky target. Now, amid growing chaos, the Yorozuya must find a way to reverse the love-crazed effects and save Edo.
Chaos descends upon Edo when a forbidden love potion known as “Aizen Kou” resurfaces in Yoshiwara, the city’s famous red-light district. This potent incense causes anyone who inhales it to fall hopelessly in love with the first person they lay eyes on. Although the dangerous substance had been banned and thought to have vanished, it mysteriously returns — throwing the entire district into romantic disarray. Among the victims is Tsukuyo, the stoic and no-nonsense captain of the Hyakka. Unfortunately for her, the first person she sees after inhaling the love-inducing smoke is Gintoki Sakata, the reckless and sarcastic leader of the Yorozuya. Making matters worse, Tsukuyo had already been quiet...