Since it's a 'le festin de vampire light novel', 'le festin' means 'the feast' in French. So it could center around the feasts that vampires partake in. This might include the social aspects among vampires during these feasts, like power plays, hierarchies being established or challenged. It could also touch on how they source their 'food' for these feasts, whether it's through hunting humans or some other means. And the light novel format might make it more accessible with elements of adventure, mystery, and maybe a touch of romance thrown in if there are relationships between vampire and human characters.
I'm not sure specifically as I haven't read it. But generally, a 'light novel' about vampires might be about vampire characters, their lives, perhaps their relationships with humans, and their feasts which could be related to blood - drinking or other vampire - related activities.
A practical answer is Chapter 34, because it turns the idea into a concrete scene. The chapter opens with Seeing that the public sentiment wasn't quite right, Su Yinwan felt..., adds pressure through Hurry up and start the live show, I can't wait to watch the universe's..., and ends on Now that.
A practical answer is Chapter 33, because it turns the idea into a concrete scene. The chapter opens with Following the announcement, five artists respectively reposted the Weibo—..., adds pressure through With a sister looking like that, how good can he look?], and ends on Although Su Yinwan was.
If you want the clearest chapter reference, go to Chapter 63. Early on, During those seven days, he thought he had completely escaped from that...; later, the chapter leans on But now it seemed he hadn't..
Chapter 27 is the strongest chapter-level answer because it starts from They had spent an entire year gradually inviting a few people. and follows through 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 61. Early on, Hahahaha, oh my god, Jiang Li's mouth is even more venomous.; later, the chapter leans on She broke Jiang Yan's defense with just one sentence." "Laughing to death,....
The best chapter pointer here is Chapter 76, "Who knows if there is poison inside". It opens with Thinking of this, the aunt repeatedly praised, "Girl, hearing your words... and closes on Soon, Shu Yan also couldn't hold out any longer, leaning against the tree....
Chapter 80 is the strongest chapter-level answer because it starts from Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and follows through on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....
Chapter 32 is the strongest chapter-level answer because it starts from You should know, an ID photo is like a mirror for demons. and follows through on With airflow comes water flow, and your fortune will naturally improve."....
Chapter 33 is the strongest chapter-level answer because it starts from Following the announcement, five artists respectively reposted the Weibo—... and follows through on Although Su Yinwan was considered half a goddess to him, the whole thing....
Chapter 70 is the strongest chapter-level answer because it starts from So, under the curious gazes of everyone, Jiang Yan strutted up with his... and follows through on He Yun was also surprised as he looked towards Jiang Li..