Wang Yue transmigrated and arrived in the Demon Slayer world from the start, awakening a Dream Life Simulator.
The stronger the emotional reactions he caused, the greater and more numerous his rewards.
[Talent: Cross-Dressing Master. Appearance, figure, and aura all maxed out. Automatically conceals all male traits, making him impossible to identify unless he chooses to reveal himself.]
Treating it as entertainment, and hoping to make up for the regrets he had from watching the anime, Wang Yue set out on a battlefield of romantic entanglements, giving up his life to save characters doomed to die in his dreams and earn rewards.
Phantom Blood
1: When Dio cried out that he was done being human, Wang Yue took a fatal blow for Jonathan. Picking up the Stone Mask, she cried too: "JOJO, I'm done being human!" She then fought Dio, and the two vanished beneath the sunlight.
Battle Tendency
1: He became friends with Caesar and Joseph. When Caesar was about to shout, "JOJO, this is my final Ripple!" he leapt out to block the fatal attack and died in Caesar's arms.
2: He transformed himself into a JoJo-level life-form for Joseph, then clung to Kars and let Joseph send them both into space.
Stardust Crusaders: He became friends with a young Kakyoin, then left him behind. Later, he died blocking Dio's attack when Dio unleashed his fist through his chest.
After the great battle with Dio, when someone confessed to him and Wang Yue was about to blow himself up, the kind System quietly began streaming from the worldlines where Wang Yue had given his life.