One interesting plot could be Snape seeing Lily and James during a Hogwarts event. Maybe it's a Quidditch match and he watches their interactions. He could be filled with a mix of jealousy and longing as he sees James showing off to Lily. Another plot might involve Snape seeing them in a more private moment in the library. He overhears their conversation about their future plans and it makes him realize how much he has lost. There could also be a plot where Snape has a vision of them through a magical object and it haunts him, making him question his own actions and decisions in relation to Lily.
A possible plot is that Snape sees Lily and James just after they've become parents. He sees the joy on their faces as they hold baby Harry. This sight could stir up a complex mix of emotions in Snape. On one hand, he might feel a deep sense of envy for James having the life with Lily that he always wanted. On the other hand, he might also feel a strange sort of protectiveness towards Harry because of his love for Lily. It could also lead to a series of events where Snape has to confront his own feelings about the family he could never have with Lily.
Chapter 850, "Wanted to Recognize Her as a God-Granddaughter", is the clearest early answer because it turns Wanted's situation into a concrete plot event. The chapter turns that into something concrete by moving from Though Jiang Li might guess her family situation, he would never know...
Chapter 859, "I Bet She Won't Last Ten Minutes!", is the clearest early answer because it turns Jiang Bufan's situation into a concrete plot event. The chapter turns that into something concrete by moving from All morning, the two little ones were quiet, not making a peep, even...
Chapter 900, "Let You Hold Your Great-Grandchild Sooner!", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. It opens with The nerve-wracking two days quickly passed.
Chapter 630, "The Secret Manual Passed Down to Sons, Not Daughters", is the clearest early answer because the hidden truth stops feeling like mere subtext.
Chapter 693, "Is a Man's Prime That Short?", is the clearest early answer because it turns Sister's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Zhao Lang had never anticipated that the bravado he had shown earlier...
Chapter 530, "I Only Drink 80 Degree Tea!", is the clearest early answer because it turns Hua Country's situation into a concrete plot event. Early on, Old Sir Gu took a step back, his expression cold and guarded as he....
Chapter 683, "This is where you will be filming from now on!", is the clearest early answer because it turns Alright's situation into a concrete plot event.
If you want the clearest chapter reference, go to Chapter 13. Early on, Sensing that something was off with Jiang Yan, Jiang Yan dismissed the...; later, the chapter leans on What on earth do you mean?" Ignoring him once again, Jiang Li shifted her....
Chapter 884, "Master?!", is the clearest early answer because it turns Chang Song's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I've heard this temple is quite magical, but why are there so many...
Chapter 566, "New Game Begins!", is the clearest early answer because it turns Chen Manman's situation into a concrete plot event. It opens with How is that possible?" Luo Xuan frowned, "What's the rush? and closes on I have a bad feeling about this.] [Wake up, when King Zheng speaks,....