MTL - Mysterious World, I Have Special Understanding - Chapter 98 key clue

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

A few decades ago, many strange gates appeared all over the world, and a creature called a demon by humans also descended at the same time, bringing unprecedented catastrophe to the human world. Humanity has a chance to breathe.

By chance, the world’s No. 1 magician gave up his identity, became a rookie tester and started again, entering the mysterious gate to participate in those unimaginable trials.

“This is also considered a newcomer?” The testers were depressed.

Completed the novel “Sword Suit” with 3 million words, “Shen Pin Dao Sheng” with 1.6 million words, “Super God Gene” with 7.3 million words (in the comics update), and “I just want to play games quietly” (in the comic novel update).

- Description from novelbuddy

I never imagined this would happen to me. Reincarnation? A second chance? Into a fictional world, no less? It was the stuff of wild stories, impossible dreams, and late-night “what ifs.” But life has a funny way of playing with your expectations.When the choice was offered—life as I knew it or a chance to die and be reborn somewhere else—how could I say no? The catch? I wouldn’t return to just any world. No peaceful afterlife, no utopia waiting for me. Instead, I landed in the heart of chaos.Here I am, standing in the shadows of giants—of gods, heroes, and monsters. Welcome to the Marvel universe, where cities are playgrounds for battles that could shake the world, and everyday people like me are nothing but collateral damage.But I’m not just another face in the crowd anymore. Somehow, I’ve got a role to play. My name in this world is Dave Garcia, and this is the story of how an ordinary guy from another life navigates a place where the impossible is an everyday reality.What would you do if you woke up in a world where the fate of everything could be changed with a snap of the fingers? Because that’s exactly what I’m trying to figure out.

Due to a bug in the game, Ren Changsheng accidentally left the game idle for ten million years.As he watched the endless stream of experience points, all Ren Changsheng could think was, 'I really do not want to level up!'