Since I don't know the exact 'Sevens Novel', it could be a mystery novel where seven clues are crucial for solving the mystery. Maybe it's a fantasy novel and the number seven represents some sort of magic power or there are seven magical items. It could also be a coming - of - age story about seven friends growing up together.
Since I'm not familiar with the specific 'Sevens Novel', I can't tell you the author. It could be a self - published work by an emerging writer who is exploring themes related to the number seven, or it could be a part of a series written by an experienced novelist, but again, without more details, we just don't know.
Well, there's a fanfic called 'The Shining Aoyama'. In this one, the reader is a new student at UA and Yuga is immediately drawn to their unique quirk. It's a really sweet story that shows how Yuga's flamboyant personality can be both endearing and a bit of a challenge in a relationship. It has some really nice character development for both the reader and Yuga.
A great 'buddyfight yuga fanfic' should have a strong plot. For example, it could involve Yuga going on an exciting adventure, like exploring a new area in the Buddyfight universe. It also needs to stay true to Yuga's character. He is known for his determination and love for Buddyfight, so these traits should be prominent.
I'm not sure specifically as I haven't read a 'sevens 345 light novel'. It could be about a variety of things. Maybe it has a plot centered around the number seven in some symbolic way, or perhaps '345' is related to a character's code or some important element in the story. Without more information, it's hard to say.
I'm not sure of a specific fanfic about them off - hand. But you can try searching on popular fanfic platforms like Archive of Our Own. There might be some really interesting stories there that explore their relationship, whether it's a friendship - centered one or something more adventure - based with them teaming up in the My Hero Academia universe.