Possible topic for a one-man musical?

Imagine you were going to write a musical where only one man (not a woman) was singing all the way through. What could this musical interestingly be about, taking this rather unique approach to the genre.

The idea needs to be strong and nuanced enough to sustain about 45 minutes of music, but to be performed by one man. Any ideas?

Possible topic for a one-man musical?say yes

How about passion? Or you can have a dialogue between two persons and you alternately play/sing the person speaking. That would be more interesting to watch than just one person.

Possible topic for a one-man musical?palace theatre opera theater

It could be about someone with a personality disorder called me ,myself, and I.|||That's pretty vague... Are you looking to be comedic? Serious? What?|||Singing train wrecks and dead darlings have been a standard in the music industry for a long time.

Have a Bluegrass Day.|||How about soldiers from different wars, say in American history, their lives, feelings,etc.

Possible topic for a one-man musical?

Topic