The Demon King's Evolutionary History [Quick Transmigration]

I wrote this story a while ago, so my dear readers, just have a laugh and move on~~ As the title suggests, the protagonist transmigrates into one world after another to win over each world's original protagonist. It's a plot-driven, power-fantasy story with an invincible protagonist. Also: ***In the first world, the protagonist is the bottom. In all the other worlds, the protagonist is the top. ****All are welcome, including readers who enjoy both roles. If you only read top or bottom pairings, feel free to skip to whichever worlds you like. Completed worlds: That domineering CEO √ That sweet, adorable movie star √ That yandere protagonist √ That ultimate villain √ This story came from a wonderfully bizarre idea. There's no CP in the ending, the journey is wild, and the male lead is invincible. Theme: Never give up.