Games like Serendipity: The Mafias

If you finished Serendipity: The Mafias, the closest matches are The Amazing Shinsengumi: Heroes in Love, The Men of Yoshiwara: Ohgiya, Psychedelica of the Ashen Hawk, Norn9: Act Tune and Collar x Malice: Unlimited. All 6 share its adventure genre and are ranked by how closely their themes and modes overlap.