Ep. 1: Koichi pursues Giorno in Naples, uncovering his identity as Dio Brando's son.

In 2001, two years after Yoshikage Kira's defeat, Koichi Hirose travels to Naples, Italy, on Jotaro Kujo's orders to secure a skin sample from Haruno Shiobana. Haruno, now known as Giorno Giovanna, deceives Koichi and escapes using his Stand, Gold Experience, which transforms inanimate objects into living creatures, turning Koichi's luggage into a frog. Giorno later clashes with gangster Leaky Eye Luca over territory; when Luca attacks with a shovel, he strikes the frog and suffers the injury himself. Koichi eventually catches Giorno, who evades restraint by his Stand, Echoes, by growing a tree for escape. Koichi informs Jotaro that Giorno is Dio Brando's son. Giorno then meets Bruno Bucciarati on a cable car, who uses his Stand, Sticky Fingers, to extract the truth after Giorno is suspected of killing Luca.

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