Grumpy Billionaire Bad Boy

His brooding attitude adds so much tension, but I wonder what inspired this particular characterization. Was it based on real personalities or pure fiction?

The way the characters are thrown together constantly heightened the stakes, but I wondered if it risked feeling overdone or unrealistic for some readers.

The emotional depth was powerful, but I’m curious whether the darker tone was intentional to reflect the characters' inner struggles or just a stylistic choice.