Playing the Fox, Strike the Snake at Its Weakest Point!

[Two equally formidable leads + female-oriented romance + childhood sweethearts + bickering couple + no angst or heartbreak + wild imagination + slow burn, but the later plot goes absolutely wild] [Carefree, slick, and indulgent man × independent, clearheaded, strong-willed woman] This is a couple constantly trying to outdo each other in crookedness and underhandedness. The future mother-in-law and son-in-law are both very polite, but only just. Their daughter is speechless: Hey, why is everyone in this family a deadbeat who won't pay their debts!!! ·A side hustle selling goods at a street stall gets them an adopted son who turns out to be a walking nuisance. ·I've wanted to force a kiss on her for over a decade, and now I'm the one getting kissed against my will. Is anyone going to do something about this? ·What do I do when the big bad is too powerful? He found four clans to back him right in front of me, then pressured me into surrendering with six points left on the clock? Big Bad: Xie Yao, an invitation really does let you do whatever you want. Pah. A beautiful romance, taking on the villain together! Then they got beaten to a pulp. No matter. From now on, we're allowed to beat others, and others are allowed to get beaten. Wei Xi: Wait! My godson was switched at birth? Shi Wu: Good thing he was switched, or your godson would be the big bad's biological son. Wei Xi's godson and the big bad's biological son: ...So Dad was adopted and I was adopted? Whose son am I, anyway? Wei Xi: My wife is so disciplined that she secretly practices and starts an arms race? She even goes against the rules and takes unconventional paths, nearly working herself to death again and again? What do I do? Help! Shi Wu: Stay out of a beautiful woman's business. If you can't beat them, join them. From then on, the two of them live an unapologetically competitive life, drawing formation diagrams even for their meals.