Okay, where do I start?
1) Your cover
The cover of your book is good. However, please, kindly consider commissioning an artist to help you take your art to a whole new level. As a reader, most people wouldn't click on your book unless the following are fulfilled;
A) Your cover is intriguing. Or, the cover art looks good and interesting.
B) Your synopsis is good and fascinating. Your synopsis has to have your greatest pitch in all honesty because it is where most readers go after looking at your cover, This is because they all want to know what your book is about!
Now, please, don't get me wrong. Your cover is good. However, if you want more readers, consider my advice.
2) Your synopsis
Please, kindly consider correcting this in your synopsis. I'll write it below.
You wrote, "Nothing will stop Kagayaki fight for what she believes in"
Can you kindly correct it to, "Nothing will stop Kagayaki's fight for what she believes in"
3) Skin color
Now, please, be careful when you use skin. Kindly try and be more diverse with it too! Almost all the characters are of certain skin color. Diversity can help enlighten the mood of the book.
For example, if someone asked you why all your characters were black in the book, what would you say? All I'm saying is that with some cultural thing, things like skin color can have a backlash on the artist. So please, be careful.
In conclusion, I like the book. I really love the fact that you have a visual representation in each chapter which would be nice when imagining the characters in readers' minds. Plus, it means that you don't necessarily need to put in a lot of effort describing the characters because they have a visual representation there to help them. Don't get me wrong, adding more detailed descriptions is good. In fact, it would even give greater effect to your book with a picture, than without one.
Hope I was helpful to you. I meant no harm but everything good for you and your works.
Have a great day,