Perhaps Elsa, Jack Frost, and Pitch cross paths. Elsa is just starting to embrace her powers and find her place in the world. Jack Frost is excited to meet someone else with such unique powers. However, Pitch, feeling jealous of their potential friendship, starts to spread lies about Jack Frost to Elsa. Elsa believes Pitch and distances herself from Jack Frost. Jack Frost, heartbroken, leaves. Later, Elsa discovers the truth but by then, Jack Frost is gone, and they are both left with a sense of loss and sadness.
One possible sad story is that Pitch, being the bringer of nightmares, wants to use Elsa's ice powers for his own evil purposes. He tries to manipulate her, making her believe that her powers are only meant for destruction. Jack Frost, who has a good heart, tries to intervene. But Elsa, confused and scared, accidentally uses her powers against Jack Frost. This causes Jack Frost pain and Elsa feels horrible about it. In the end, Pitch gets away, leaving Elsa and Jack Frost in a state of sadness and distrust.
A sad story could be that Pitch targets Elsa's kingdom of Arendelle. He spreads his darkness there, causing chaos and fear among the people. Elsa tries to fight back with her ice powers but is overwhelmed. Jack Frost arrives to help, but Pitch manages to turn the people of Arendelle against both Elsa and Jack Frost. They are then forced to flee. As they run, they realize that they may never be able to return home, and the thought of losing their homes and the trust of the people fills them with great sadness.
Chapter 731, "Ye Chu Died", is the clearest early answer because it turns Aunt Xu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Dean, can I really not do it? to She'd been acting off these days..
Chapter 639, "Young Master Gu, Does Your Family Need a Dog?", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. The chapter turns that into something concrete by moving from Half an hour later, Jiang Li pushed open the door and walked out.
Chapter 908, "Wrapping Up Successfully!", is the clearest early answer because it turns Jiang Bufan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Mingchuan, after a busy day, also returned home.
Chapter 740, "Someone Who Can Live Through the Days", is the clearest early answer because it turns Fang Kai's situation into a concrete plot event.
Chapter 826, "Deadlock", is the clearest early answer because the violence around Yu Li becomes final instead of hypothetical. The chapter turns that into something concrete by moving from The Li Family Master had spoken, so Father Yu quickly followed suit...
Chapter 705, "Is She Her Own Destined Noble Person?!", is the clearest early answer because it turns Chen's situation into a concrete plot event. It opens with He Wen was made to laugh by Bai Lu. and closes on Outside the building, Zhao Lang gazed thoughtfully at the car parked....
Chapter 685, "Defense Value Skyrockets!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with The scene went live on Weibo right then. and closes on How could he not be furious?.
Chapter 827, "Mystical Event Investigation Bureau", is the clearest early answer because it turns Qixing Tower's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li's words indeed make sense.
If you want the clearest chapter reference, go to Chapter 17. Early on, Jiang Li glanced at Jiang Shixu, who was tense and anxious behind her, and...; later, the chapter leans on Okay, let's go eat." After speaking, she strode forward..
Chapter 713, "Uncle Will Owe You for Life", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. It opens with Jiang Li raised her head and was startled by Zhao Lang's smiling eyes.