[Beautiful, Strong, Intersex] Reborn as a Villainous Side Character, I Join Forces with the Demon King to Take Down the Cheating Protagonist

Reincarnated as the villainous male side character in a game?! And the kind who dies miserably in every ending?! After thinking it over and over, it seems the only way to escape this tragic fate is to... join the enemy?! Let's do this, my Demon King. We can join forces and take down that cheat of a harem-protagonist together!!! Top x Demon King bottom (handsome top x strong, intersex bottom) ...Secretly starting a new story. I never knew titles could be this long... P.S. I started this using an old story I'd deleted, so please don't mind the blank chapters. Anyway, the author is a useless, illiterate idiot with no brains or logic, and only writes what they want. If that's not your thing, click the X in the upper-right corner or swipe away to kill the process. Thanks! Premise: A reincarnated villainous male side character teams up with the Demon King to take down the cheat protagonist.