Well, first, build interesting characters with depth and growth. Also, pay attention to the pacing of the story. Don't rush or drag it out. Another key aspect is world-building - make the fictional world vivid and immersive.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.
I'm not entirely sure as there could be many different 'past life regressor' novels. Generally, it might be about a character who can regress to their past lives and experiences things over again, perhaps to correct mistakes or gain some sort of power or knowledge.
Raising one's hand in class was a common way of describing the protagonist's personality, attitude, and depth of thinking.
The following is a possible description:
When he saw the teacher's eyes fall on his desk, he immediately stood up and hesitated for a moment before raising his hand. There was a nervous look on his face, as if he was worried that he would make a mistake or be criticized by the teacher.
The teacher saw him raise his hand and asked with a smile,"What's wrong, student? Do you need any help?" The protagonist hesitated for a moment before nodding. His voice was a little shaky, but he expressed it clearly. He briefly described the problems he had encountered at school today. The teacher nodded after listening and said,"You make a lot of sense. I will remember your name."
A grateful smile appeared on the protagonist's face. He felt that his efforts had been recognized. He continued to listen to the class, but he kept thinking about this matter. He felt that he was really lucky to have met such a good teacher.
I'm not entirely sure as I haven't read it in full. But generally, a 'past life regressor' type of light novel might be about a character who somehow regresses to their past life. It could involve things like using knowledge from the present life in the past life to change events, gain power, or solve mysteries.
In a 'past life regressor novel', the main character is, of course, the one who can regress to past lives. This character is usually on a quest of some sort. There could also be a love interest, someone who has a connection to the regressor's past and present lives. And then there might be an enemy, perhaps someone who fears what the regressor might change in the past that could affect the present or future. For example, in some novels, there could be a powerful wizard or a corrupt noble who wants to keep the status quo and thus tries to stop the regressor.