I'm not sure specifically as there could be many different 'deadbeat noble' light novels. Generally, it might be about a noble who is lazy or irresponsible in some way and the story could revolve around their adventures, misadventures, or their growth and change in character.
I'm not aware of any extremely popular 'deadbeat noble light novels' off the top of my head. There are so many light novels out there that it's hard to keep track of all the different sub - genres and specific titles that might fit this description.
The 'Reformation of a Deadbeat Noble' light novel probably focuses on the journey of this so - called deadbeat noble. It might explore his relationships with other characters, such as his family, friends, or rivals. As he reforms, he may have to face his past mistakes and make amends. There could also be elements of adventure as he tries to prove himself anew in a world that may have had low expectations of him.
One key element could be the transformation of the character of the deadbeat noble. Instead of being lazy and irresponsible, they might start to take on responsibilities. For example, they could begin to manage their family's estates or get involved in community affairs.
It's a story that might focus on the experiences and adventures of a person who is considered a bit of a slacker when it comes to meals or life in general.
I'm not sure specifically as I haven't read it, but it's likely that the deadbeat noble himself is a main character. There may also be a mentor - like figure who helps him in his reformation process, or perhaps a love interest who serves as a motivation for him to change.
Obviously, the deadbeat noble himself is a crucial character. He is the center of the story's transformation. There might also be a mentor - like figure who guides him in his reformation journey.
One of the main themes could be self - improvement. The deadbeat noble has to change and reform, which implies a journey of self - discovery and growth. Another theme might be social status and how one's actions can either uphold or change it.
By making the characters relatable. Modern readers can identify with the idea of personal growth and change, so if the deadbeat noble's reformation is well - portrayed, it can draw them in.