Isekai / RPG game like / Fantasy World fever 3

OP Demon (?) lady tasked by QT system to level up various fake FLs (transmigrator abusing OG cast) hatred in order to bring the world balance back.

Kinda similar to "Cheating men must die" except her job is to specifically humiliate n piss people off. MC is ruthless and a glutton (for a reason). Cute look system but kinda devious. Same ML. They are pro at rilling each other up (frienemy). Slow burn. Not sure why systems keep involving their missions (both think the other is diff NPC each time)

After reading the novel where her beloved 2nd ML died getting revenge for his mistress, she transmigrated has said Lady with her favorite buttler waking her up? Here is her chance to give him the happiness he deserves!

Mc is a smart but normal girl in an OP body. ML is Op and such a sweet bun. Lot of people hate OG FL but I find her more pitiful. So I though it was classical plot but slight twist about OG FL makes things way more interesting.

Became her sister's web novel's villainess, the Princess. Gain the MLs love? Escape n become a commoner? Hide behind the FL? No, she will make the true Princess and FL...The Emperor!

Prologue sold me dreams, I loved the end goal. Almost drop because it was usual plot for a loong time, and then plot finally started moving (c30ish) now that OG FL joined her. But now it's kinda anxiety ride? Anyway hope this won't let my hope for the end goal end. MC is not a power lady, just an average lady.

Young chef transmigrated has a shunned and depressed (suicide attempt) bastard noble lady. Time to change! And as she do people around also seems to be different than he her memory?

Both Mc and Og self had similar sad past. Mc's smart and love to cook. It seems that instead of vicious people, it was more Og self who was extremely suspicious (understandably) of her family except for the step mother who's a real bitch. Classical weak to op (cook) and loved.

Reincarnated as a noble lady in her friend's novel who's destined to live a confortable and normal life, she only needs to freely help the main characters.

Refreshing. A nice change of pace despite 1st impression. I though MC was overbearing, but after her plan explanation.. Gives both MLs equal chance to seduce FL (that both already like). She doesn't hide that she's reincarnated (tho it's taken as a joke), and doesn't regress to be childish unlike some other isek