I Accidentally Conquered a Great Demon King [Quick Transmigration]

Blurb: No matter how refined his appearance or artistic his name, nothing can hide the delinquent at heart that Han Zhiyuan is. Except: Han Zhiyuan: I'm done for. I've been possessed. Idiot. Have you been listening to too many ghost stories? Han Zhiyuan: I swear it's true. I nearly died just now. The Demon King said, "Mortal, if you don't retrieve the fragments of my soul scattered across the realms, I'll erase you from existence! I'll destroy your soul!" In short, the Demon King could kill him with a single breath! And so Han Zhiyuan was forced to embark on a journey of transmigration to awaken the Demon King's scattered soul fragments. But how was he supposed to awaken them? Make them fall in love. The Demon King was cruel and heartless, so the gods used the purest love to seal him across many worlds. Love would awaken him. So, basically, I just keep repeating, "Make the soul fragments fall in love with me"? Han Zhiyuan: Could this get any more cliche? The Demon King raised an eyebrow. "Hmm?" Han Zhiyuan backed down. "I'll do my best." This is really just a story about the male lead transmigrating through different worlds to win over the Demon King's soul fragments. After chasing and chasing, he finally conquers the Demon King. P.S. 1. Before awakening, the soul fragments have no memories of being the Demon King. Once awakened, they return to the Demon King's main soul. 2. The love interests are all the same person. 3. The protagonist is the pursuer. Coming soon: another Quick Transmigration story with a pursuing protagonist, "The Second Male Leads I Helped Get Their Happy Endings All Turned Dark [Quick Transmigration]" Blurb: In every Mary Sue or toxic romance world, there's a devoted, perfect second male lead who can never win the heroine's or love interest's heart. Xi Lang is bound to the [Second Male Lead Support System], and his mission is to enter these novel worlds and quietly help the second male lead turn the tables on the male lead and win the heroine's or love interest's heart. Xi Lang finishes the job, then leaves without a trace, hiding all credit. But one day, the System suddenly tells him that all the second male leads he helped have turned dark after he left. He has to go back and stop them, or those worlds will collapse. Xi Lang: ? Have they all lost their minds? The second male leads: You think it wasn't because of you? You flirt with us, then run off. Proud of yourself? Xi Lang: Huh? Huh? Note: The love interests are all the same person. Theme: