Another theme could be the exploration of their pasts. How their individual pasts have shaped them and how that in turn affects their relationship in the fanfiction. Maybe delving into events that made them who they are and how they come to terms with each other's pasts while building their relationship.
One common theme could be family dynamics. Since Edward and Esme have a relationship within the context of a family - like in some stories, exploring how their bond affects the family unit might be a theme.
Chapter 424, "He Must Be Very Strong", is the clearest early answer because it turns Chen Fan's situation into a concrete plot event.
Chapter 621, "What Makes You Think I Would Save You?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with The two walked for a long time before they reached a point where the...
Chapter 655, "The Newly Minted Billionairess, My Sister!", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event.
Chapter 522, "The First Test for the Scion of the Wealthy Family Has Arrived", is the clearest early answer because it turns Scion's situation into a concrete plot event. It opens with The assistant director's execution was swift; within less than half...
Chapter 719, "Borrowing Their Luck", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event.
Chapter 503, "How could they let an actor marry in?", is the clearest early answer because it turns Mrs's situation into a concrete plot event. The chapter turns that into something concrete by moving from The servants standing outside the gilded mahogany gateway were all...
Chapter 602, "Did Our Ship Capsize Too?!", is the clearest early answer because it turns Jiang Zhao Yuan's situation into a concrete plot event.
Chapter 543, "Please Name Ten Things You Dislike About Su Yinwan", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 455, "She is Entirely My Weakness", is the clearest early answer because it turns Dean Yu's situation into a concrete plot event. The chapter gives readers a real answer by opening on The marathon-style competition ultimately ended with Shang Shuyue...
Chapter 817, "Killed by Me", is the clearest early answer because the violence around Lin Manru becomes final instead of hypothetical. It opens with Jiang Buchen leaned against Meng Wanzhi's chest and thoughtfully... and closes on Her brother had always been unwell since birth, so her parents....