The Yu Brother's Case Book - Volume 1 Chapter 4.3

“Welcome aboard the Dimensional Rift game exclusive train. This train will depart from the Level E Departure Station and head to Level D stations. Please ensure your safety while boarding in an orderly manner and abide by the train rules.”“The train rules are as follows:”“1. Do not bring non-game items onto the train. (Underwear is the exception)”“2. Consumption is mandatory. (All train staff are unpaid volunteers)”“3. Do not turn on the lights after they are out. (Except for those who are exceptionally talented and courageous)”“Additionally, the train encourages various leisure activities such as sneak attacks, brawling, and predation. Players are free to choose.”“We wish you a pleasant journey.”

Jian rue gazed back at the ugly gray alien while stumbling and running. he clumsily tossed a stone at it “Fuck just leave me alone!!!”Suddenly a warm pair of hand grabbed his waist and tossed him over a study shoulder.“Xing yu!! let me down! you fucker!!!”The said man chuckled and playfully smacked his butt. “Honey, I'm saving your life~”“I had it under control. Now, let me go!” Jian rue bit his shoulders hard until the sweet taste of blood filled his mouth.“Hiss.. baby, you're making me hard~”Jian rue froze. “W-why are you following me! why me..”Xing yu stopped running, and with a swing of his sword, the ugly tentacle alien was slayed. He gentnly pulled him down and hugged him close. Peering into his eyes, he smirked, “Because you are my betrothed,”

An anime otaku who has traveled to the world of full-time hunters, in order to live well, he can only keep getting stronger all the time, burying the strong one after another. Your withered life will be continued by me.

- Description from novelbuddy

The leader of the thousand demons, the Demon God Chun YeoWoon. Due to an unfortunate accident, he had been sent to the distant future.