Hello, LPman

Cool! Super cool!
As Mario said, excellent chord progression, great backing tracks and very good vocals.
It's a very nice idea to vocalese ad-lib phrasing.
It reminds me of The Double Six of Paris, jazz vocal group of 60's a little bit.
YouTube video below.
https://www.youtube.com/watch?v=5fSDDxu29aU

Enjoyed my listen a lot.

Best regards.

Shigeki Adachi