Baka to Test to Shoukanjuu‎ - Collaboration Anthology 2 — Idiots, Staircase and Summoned Beasts

Zero, a 35-year-old mercenary, after being betrayed by one of his teammates who told his enemy about him. He chooses suicide so that he can kill his enemy and his traitor teammate. After that, he was reincarnated into the world of magic, in the body of an 18-year-old teenager with the same name as him. However, his body does not have mana or the talent for magic. But with the help of the cultivation system, he has unrivaled power in the world and has a harem of beautiful wives.

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

The beauty and the taboo existing together.Unattainable and unacceptable.An existence only to be admired from afar.A hero of legends but a also a girl of tragedy.Shining like a star in the sky, all alone, forever…-But that’s too sad isn’t it?Our MC, an ordinary middle aged man, is an author that wrote books and after pouring 2 years of hard work in a book, his hardwork finally bore fruit as his book got the second prize in the regional awards.A fruit that he couldn't eat.Why?Because he along with hard work, he also poured his piss somewhere he shouldn't and died.Exactly how?Read the prologue, and you will find out~But of course, that's only the start, as the next time he woke up...He was in another world.

Luo Ning, a cannon fodder female supporting character in a celebrity circle's group pet novel, gets a rerun of life—this time she refuses to be the cannon fodder!Haters clamor: “Luo Ning is just a vase, bad at singing, dancing, and acting; always riding on top celebrities' coattails to generate heat, first-class in everything but talent except for her looks.”Later, when Luo Ning who excels in singing and dancing, skilled in musical instruments, chess, calligraphy, and painting, survival skills, gourmet cooking, and also proficient in drawing talismans and fortune-telling appears before the public—extremely beautiful, highly intelligent, and with explosive acting skills.Haters are convinced: “Sister, I can do it!!!”Suddenly, one day a bombshell hits social media.A photo of the mysterious film emperor Lu Xun kissing Luo Ning's cheek surfaces, igniting a whirlwind of scandals across major headlines.Fans and onlookers do not believe it, “Impossible! The photo must be positioned in a misleading way, Luo Ning wants to cling to the film emperor for hype again, shamelessly chasing for popularity and traffic!”Before Luo Ning could respond, the usually low-key Lu Xun clarifies first.@LuXunV: The photo wasn't positioned misleadingly; the shameless one is me!Following this, everyone witnesses the film emperor changing styles daily on social media, showing off his love; either showcasing the cuisine made by Luo Ning or her beautiful photographs.Fans and the public are stunned, never expecting such a demeanor from the film emperor...