A Wild Man Has Entered the Academy - Chapter 130:

[Congratulations Seo Hoyun! You have been selected as a player in the Unknown Idol Tycoon.]The good-for-nothing PD, who is criticized by everyone, becomes a unknown idol in a parallel world.Only his younger sibling remembers him.To return to the original world, he must become a top idol and clear the game!“…Quest accepted.”“Are you crazy?”“Don’t we need to eat and live?”His specialty is blackmailing, his hobby is persuasion.The survival story of the unscrupulous PD-turned-idol who will stop at nothing!

At the end of the story, I found myself in the body of a hidden villain, betraying the heroines. Since I’m not particularly concerned about the end of the world, I’m calmly waiting for the finale… “You’re the only one who truly appreciated my painting of the boa.” “When I make plans to meet you at four, my heart starts racing at three... is this what they call being tamed?” For some reason, the heroines are starting to take an interest in me.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

Mysterious gates appeared all around the world a few decades ago. Beings emerged from the gates and brought disaster upon humanity. Humanity called them Demon Spirits. It wasn’t until the advent of Demon Suits and Demon Suiters that humans stood a fighting chance.For some perplexing reason, the world’s number one Demon Suiter, Li “God” Xiu abandons his identity to start over again as a newbie trial-taker. He enters the gates to participate in all sorts of trials, in a bid to seek out the reason that enticed his best friend into becoming a trial-taker.These trials weren't the run-of-the-mill dungeons, ranging from game sports (soccer, basketball, baseball, etc) to athletics. Just as fortune favors the brave, what would Li Xiu obtain on his quest?“Are you telling me he’s a greenhorn?” the other trial-takers frustratingly ask while watching Li Xiu's feats that prove why he's the number one Demon Suiter.