My father-in-law (ver. None in particular)

My father-in-law half-jokingly asked me to write a song for him, so I started playing the keyboard, wondering if I could use the music database functions to do something, and this is the song I came up with.

This song is about a couple who get married and have a new father-in-law, but since they don't live together anymore, they are leaving home.

This time, I started streaming and thought I'd add some singing to it.