Reborn as an Extra

When Rio opened his eyes, he found that he had been reborn as an extra in a novel which he finished reading just yesterday. Moreover, he has become a student of the same battle academy, where the main plot will happen. .... Looking at the protagonist playing with his harem, Rio shook his head and decided: "I will steal the protagonist's chances; as for what will happen to the main plot? I don't care..." "Why would you care about the plot of the story if your own life is miserable anyway..." Would you like to accompany Rio on his journey and find out where his selfish stealing activities will lead him? [NO HAREM, SELFISH MC, FAST-PACED, DIABETIC ROMANCE!] .... *The book cover is an Ai art! same is true for the character arts!* My discord server link:- https://discord.gg/Rv8xabCnzP