The Mermaid's Kiss

Hunted by enemies, Hadrian, the mafia boss who rules the black street, falls into the deep sea. As he is about to drown, the merman Marinus passes his mermaid pearl into Hadrian's mouth and carries him ashore, and under the effect of an aphrodisiac the two spend the night together. The next day Marinus discovers he cannot return to the sea without his pearl. To get it back he keeps coming to Hadrian for kisses but never succeeds, while Hadrian, unaware of the truth, takes the kisses as seduction and falls completely for the merman who won't leave him alone.