Sona's Extraordinary Life in Marvel

When the Dragon King could no longer endure the curse of losing his freedom and insisted on taking off his crown, Valoran was in danger of destruction and collapse. All hopes were placed on a new world and her, but the person involved knew nothing about it...
(The original title of the book is "Valoran in Marvel". The protagonist is Sona, but many heroes will appear, so the protagonist is offline every day. The setting of the void is different from the League of Legends universe.)
The book is a bit slow to get started, so make sure to read to the end.