Transmigrate inside a Web Novel as a Side Character.

On his way home from a part-time job, A college student named Soma found himself falling asleep on the bus he rode.
However, after he woke up from his slumber. He found a single email from the Author Chronicles Saga series he has been reading, for the past year and the content from the email was
{..YOU are inside the novel I wrote..
"Huh?".
"..Now I will give you a chance to save that favorite heroine of yours, yourself. The decision is yours to make, how will you handle it?. I hope you can do it, hehehe. Now for the last, I hope you can experience and enjoy yourself, and live however you like in a world that I created.

Sincerely from
Side_Author}
“...Is this for real?”.
Follow Soma’s story inside the novel world he transferred into as a Side character that will overthrow the story and the world, with his reliable comrades.

***

Author's note: This was My first book. I hope you can enjoy the series I wrote. Also, sorry in advance. English is not my first language so I think you guys would find some misspelled words or grammar mistakes, I hope you can tolerate it. I welcome any suggestion/feedback that will help me grow as an Author.