When I Was Reborn as the Butler in a CEO Romance

I transmigrated into a book.

The annoying part was that I'd transmigrated into an old-fashioned, over-the-top Mary Sue romance novel about a CEO.

The good part was that I hadn't become the female lead or a supporting female character.

I'd become the CEO's butler.

You know, the kind of butler who steps forward with a look of relief when the CEO smiles and says, "It's been so long since the CEO smiled."