Well... this is a literal shower thought I had.
One entertainment label having a girl group and a boy group, and then maybe the girl group has a song about a break-up. (I know it sounds cliché)
And then later the boygroup has a song that is about the same break up, but from the guy's perspective.
Like imagine if the girlgroup had a song that had lyrics like
You broke my heart
I'll never forgive you
You're such a bad boy
And you will never change
and then the boygroup's song is like:
I'm sorry for breaking your heart
Can you forgive me?
I'm a bad boy
But I can change
This thing is reminding me a bit of when there was an AJAX song that was a sequel to SNSD's "Run Devil Run" (but well... SNSD and AJAX are not from the same company)
Even though I guess that the songs, I just made up could work as being just one song and could maybe just be a duet.