I just had to use the eccentric family generator that @sicarius posted about, to make my own Kdrama. Here are my characters:-

Protagonists – A kind-hearted Step Mother & a kind-hearted Dog
Love Interests – Two talented twins (oh my my!)
Antagonist – The FL’s evil cousin
(since she is a mother) Child – A criminal butler

So. Our FL is a filthy rich widow who inherited her husband’s wealth after his death. She also received a step-son with the package, a step-son who hates her despite her love for him. He sees her as an evil monster who snatched his father away from him & then killed him, all for money. He runs away at a very young age, gets taken in by a gang, & grows up to become a criminal. Unable to forget his past however, he returns to his childhood home, pretending to be a butler, to find proof about his father’s murder & expose the FL.

Meanwhile, the FL has led a lonely tortured life, wracked with guilt over losing her & her late husband’s only son. She goes from day to day listlessly, in constant search of him. The only companion she has is a dog who, as a puppy, had managed to break into her mansion on one rainy night, tracking little muddy paw prints all the way to her room. She had taken him in and taken comfort from him, seeing him as the son she lost. Years later, on just such a rainy night, fate brings two musician twins to her door. And her present slowly starts to move again.

……honestly, I would watch. This seems like a good melodrama train wreck at the very least. I, henceforth, name thee The Temptation of the Double Entendre . Go, my child. Go & get me those ratings.