If you search for "One Sided Passion 1986 full movie" on Google, you'll find dead links, IMDb placeholder pages with no cast, and a Reddit thread from 2019 with zero replies. But if you add to your query, the digital tomb opens.
Produced by Fuxia Film and written by Siragusa alongside Piero Regnoli, the movie was originally released in Italy on March 19, 1986 One-Sided Passion (1986) - IMDb One Sided Passion 1986 Ok.ru