Inside my Own Book:As an extra I will win the main female lead's heart

Mark a famous author wrote many books to be precise romantic books fmaous all over the world. His first book was Finding my soulmate he really loved that book. In that book he gave his name to a side character just because he was insignificant. But one night while he completed his final masterpiece after which he told everyone he would retire. he completed it at morning 2:30 am. tick tock tick tock. the sound of the clock going then suddenly as he relased the last 20 chapters in the form of last mass release. His heart started beating faster, faster and faster. He closed his eyes thinking atleast with all money he earned as an author he provided his mom, dad and his kid a better life. (his wife divorced him cuz she was attracted to some one else didn't take his money later he heard she also left that guy and is with soemoen else now he doesn't care about her anymore) then his eyes open he sees he is in the body of a 17-year old teenager inside a cafe. then a beautiful girl, brown long hair, green eyes, came and sat started drinking her coffee holding his hands on table not smiling. She was about to say something but Mark's head started to pain as memories came flooding in he came to know this was also Mark but from his first novel. Due to this sudden action she took him to hospital there came to know this happened due to less rest. In this life Mark was determined to be a famous Guy and not a side character with the knowledge about this fantasy world he created even if the other factors he didn't write about happens who cares -- Read it when I will release it will be fun.