Joker-Quinn situation

A "Joker-Quinn situation" is a type, or at least style, of a "love situation" where two people fall in love.

The situation involves a crazy or demented person and a normal or regular person who meet and they both fall in love, like Joker and Harley Quinn, when Harley was a psychiatrist before she fell in love with Joker.

Jacob and Elise's relationship story is like a Joker-Quinn situation.