Well, one possibility is that Ash has changed a great deal due to the war. Maybe he has new skills or a more hardened personality. He could struggle to fit back into his old life with Serana. For example, he might be haunted by the memories of the war and find it difficult to be as carefree as he once was with her.
Another thing that might occur is that Ash brings back some sort of danger or enemy from the war. This could put Serana in jeopardy and they'd have to face it together. It would be a test of their relationship and their individual strengths. They might have to rely on each other more than ever before.
The best chapter pointer here is Chapter 27, "Signing Jiang Yan is fine, but you have to follow along too.". It opens with They had spent an entire year gradually inviting a few people. and closes on Yes, I'm sorry." He nervously twisted his hands, "I was impulsive." "It's....
If you want the clearest chapter reference, go to Chapter 41. Early on, The live streaming room suddenly boiled over again.; later, the chapter leans on [Did this matter really have such a big impact?.
Chapter 917, "The Civet Cat Replaces the Crown Prince", is the clearest early answer because it turns Hong Pei's situation into a concrete plot event.
Chapter 846, "Locked up for 6 months!", is the clearest early answer because it turns Siyue's situation into a concrete plot event. It opens with She took a deep breath, and a guilty expression immediately appeared...
Chapter 722, "It's Time to Tell Him the Truth", is the clearest early answer because the hidden truth stops feeling like mere subtext.
Chapter 791, "There's Actually a Suona?!", is the clearest early answer because it turns Ling Bei's situation into a concrete plot event. Early on, The lights in the audience suddenly went out, and immediately, the.... By the end, He had never even met the person, what if he messed up on stage?.
Chapter 11 is the strongest chapter-level answer because it starts from After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and follows through on Miss Qin, please accompany us to the police station to explain this....
Chapter 1 is the strongest chapter-level answer because it starts from Jiang Li, I'm warning you, don't set your sights on Yinwan anymore, or... and follows through on Yet before she had the chance to teach her a lesson, the male lead arrived....
A practical answer is Chapter 10, because it turns the idea into a concrete scene. The chapter opens with Qiao's shocked face struggle to recover, Lin Manru also tasted for the..., adds pressure through The young man stood motionless, his gaze fixed on the girl below, and..., and ends on Who was.
Chapter 816, "Don't Take Them Seriously", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on Unexpectedly, they didn't cry or fuss; they stopped right by Meng...