Would you be interested in reading the opening scene of my M/M novel? I confess the love is a bit insta, but one of the characters, Harvey Milk is an Opera lover and even died while looking at an Opera House facing Tosca. The opening scene contains a fair amount of Opera, including, of course, allusions to Tosca. There is also a lot of singing. I would value your feedback. You can read more about it at harvalan.com.