MTL - Marvel: Become Athena - Chapter 54

After a year of relentless effort, Alex becomes the first to conquer a tutorial quest deemed impossible by the entire playerbase of Endless Leveling Online. But instead of loot or leaderboard fame, he earns something far stranger—an invitation from the God of Games.His prize? A one-way trip to Arcana, a living, breathing world where stories shape reality—and a chance to become the Protagonist of his own story.In a land of endless possibilities and ever-shifting destinies, Alex would try to bend the rules, rewrite fates, and forge his own legend. But being the Protagonist means more than glory.It carries a heavy responsibility.As secrets unravel and alliances are tested, Alex must decide whom he must protect, and save before the world collapses under the weight of its own story.

Cifer was offered as a sacrifice to the devil by his own family. Instead of dying, was given a chance to live in another world. The One True God has given him a mission. Stop the higher being calling themselves gods from snatching soul from the life stream and restore balance.An adventure will begin from a devil's sacrifice to be one of the most powerful beings seen.With a body of a titan and souls of devils, grasp power and devour everything for happiness and freedom.

When other people experience a body transformation, it is inevitably either male to female or female to male.

Me? I wake up to find myself transformed into two different bodies.

Both a male body and a female body, one conscience operating two bodies, all sorts of embarrassing moments.

Walking together normally makes other people think that I am sweethearts with my other-self, such sadness.

Also, the entire business of a hero rescuing the beautiful maiden, I call Bull.

I get slashed by a sword and my female body gets abducted, and he wants me to thank him?!?! Can it be less of a tragedy?

- Description from Novelupdates

This is the era where people prioritize science and Martial Dao. After the great disaster, the human race discovered the Ancient Zenith civilization. They entered the Age of Great Cultivation and began their journey to colonize the Kunlun Realm!