What is the love and madness in the American drama After Everything by Anna Todd?

It seems there might be a bit of confusion in your question related to titles and authors. Anna Todd is the author of the "After" series, which began with "After," a novel that was originally a Harry Styles fanfiction on Wattpad before being published as a book series. The "After" series is a romantic drama that follows the tumultuous relationship between Tessa Young and Hardin Scott, and the story includes themes of love and the potential madness that can accompany intense relationships. However, this series is not typically referred to as an American drama by the title "After Everything."

If you're referring to the film "After Everything" (2018), which has no connection to Anna Todd's work, it is an American romantic drama directed by Hannah Marks and Joey Power. The film follows the story of Elliot and Mia, whose budding romantic relationship takes an unexpected turn when Elliott is diagnosed with a life-threatening illness. In that context, "love and madness" might describe the passion and unpredictability the couple faces as they navigate the challenges of Elliot's health issues, their relationship's dynamics, and the intense emotions therein.

To avoid confusion, please specify if you're asking about Anna Todd's "After" series, or the separate film "After Everything," as they are two distinct works with no direct relation to each other.