F+M Beginner dark romance book suggestions FMC librarian or similar ‘quiet jobs

Hi all, I'm looking for FMC + MMC beginner dark romance requests or slightly beyond beginner level. I would like suggestions as follows: – A FMC who is quieter, gentle, kind and it's okay if she's a 'virgin heroine,' I don't want a party girl – Masked Man suggestions are okay – MMC in mafia [...]