Detective Casanova & Ms. Watson

Two polar opposites. The bubbly personality meets cold and analytical. It's destined to clash at one point. It was sooner rather than later. Everywhere else, they act like mortal enemies. Between them though, everything said outside of their safe haven is superficial.

Many often joked that the world would end if they were separated. Others joked it was the end of the world when they finally agreed to something.

They come to find that both are true when one disappears and is replaced by a rather peculiar double. Everyone acts as if nothing's changed... There's even memories that far precede this person's "existence". But Watson and the impostor know better, and they intend to send the impostor back where he belongs, and to get the real Holmes back.