[System middleman, world protagonists doing the legwork, lighthearted, sly schemer, myriad worlds, no heroine]
(This isn’t a traditional System novel. The protagonist has no System, so feel free to read.)
What? I scam and swindle people? Don’t you dare slander me!
What? I exploit those I bind with? Don’t talk nonsense!
What? I’m vile and shameless? Say that again! I’ll spray you to death with a mouthful of salty soda!
…
Cheng Yang graduated from System University, but was in a car accident while job hunting and tragically lost his life.
What he never expected was that even after dying, he’d still have to find a job!
He gave up on becoming a System and missed out on being one of those enviable bound partners. Instead, someone conned him into becoming a System middleman, and from there, things got completely out of hand.
System A: Ding! The bound partner completed a temporary task: washing their hair upside down. Reward: 5 System Favorability points.
System B: Ding! Task issued: Show concern for a friend. The bound partner gives Cheng Yang a massage. Reward: 5 System Favorability points.
Cheng Yang looked at the bound partners under his supervision and was thoroughly pleased.
…
But after leaving the beginner world, the tone of the worlds that followed took a turn.
He traveled through battlefields of plants and zombies, wandered through a world of blocks, and finally found a normal world, only to discover it was haunted...
I have to say it's still a bit outrageous.