Typically, in 'isekai maou to shoukan dorei majutsu light novel', the main character is a person who is suddenly thrust into this new world. This character has to figure out how to survive and thrive in a place where summoning slaves and using magic are common. There might be a female lead character as well, who could be a slave or someone who helps the main character understand the new world's rules regarding slaves and magic. Additionally, there could be other important characters like a mentor figure who teaches the main character about advanced magic or how to manage the slaves more effectively.
I'm not entirely sure as there could be multiple main characters. But generally, there would be a protagonist who is summoned to the other world and is likely involved with the slave - summoning and magic aspects.
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.
Look to Chapter 23 for the clearest answer. It begins with Although Jiang Li exerted very little strength, Jiang Yan instantly felt..., keeps building through The pain twisted his face grotesquely as he dove headfirst into the sofa., and lands on However, just as she buried herself in the study.
If you want the clearest chapter reference, go to Chapter 42. Early on, You've all met now, so this game is very simple," Director Sun said.; later, the chapter leans on That is, give each of the other five people in the room a score based on....
If you want the clearest chapter reference, go to Chapter 62. Early on, Sitting on the edge of her bed, she pondered for a while before lifting...; later, the chapter leans on The moment the door opened, she saw her photographer with his hand still....
Look to Chapter 41 for the clearest answer. It begins with The live streaming room suddenly boiled over again., keeps building through [Did this matter really have such a big impact?, and lands on In contrast, Wen Jiaojiao didn't have such awareness..
Chapter 34 is the strongest chapter-level answer because it starts from Seeing that the public sentiment wasn't quite right, Su Yinwan felt... and follows through on Now that Lili is misunderstood, they start to kick us while we're down."....
Look to Chapter 46 for the clearest answer. It begins with Upon hearing this, everyone but Jiang Li perked up with high alert., keeps building through After all, there were only a few who didn't care how others saw them., and lands on Did you calculate the score incorrectly?!" And 13 points?!.
If you want the clearest chapter reference, go to Chapter 66. Early on, I can't take it anymore, why did the young master even find a pair of...; later, the chapter leans on He just knew that his eyes were swollen like a small hill and he couldn't....
If you want the clearest chapter reference, go to Chapter 84. Early on, When the villagers tasted his curry beef one by one, their faces revealed...; later, the chapter leans on In the end, he could only secure a score of 5..
The best chapter pointer here is Chapter 68, "She finally managed to win a round back!". It opens with Jiang Li carried the noodles straight out of the kitchen and came to the... and closes on But didn't Uncle Zhao say he was still sick?.