(Anime Crossover) The Heroic Spirit's Mischief

Cheng always thought he was a tragic Demon King. He had set out to destroy the world, yet somehow ended up becoming its “Savior.” Unwilling to accept this, he made a pact with a similarly dissatisfied offshoot of Alaya’s consciousness and became a Heroic Spirit. Because he had once glimpsed the world’s true nature, and because his pact was not made with Alaya herself, he became an unusual Heroic Spirit, one capable of traveling through different worlds... But Cheng is feeling pretty frustrated right now. Why does his Master always end up finding their other half?! Actually, at first he really was just playing a prank... Has he really mastered the “matchmaker skill”? Currently revising the story. Suggestions are welcome. I’m doing a major revision, aiming to flesh out Cheng’s character and fix earlier plot holes. If you still spot problems or find anything hard to follow, please point them out in the revised chapters. Lastly, readers, please suggest your favorite pairings and shows or films. The whole point of starting this story was to indulge in all kinds of beloved pairings... However, please note that pairings from xianxia settings are off the table. Given my writing ability, I can’t make the story work if I add a xianxia world, nor can I connect the individual stories reasonably with a single thread. Thanks~ Please tell me which pairings you love~~ Preferably canon pairings... That way, I can revisit those anime too... Note: Any kind of pairing is welcome, whether BL or BG.