The Earth is Online - Chapter 152

Shen Yuan, a normal human who was living his life peacefully on earth died mysteriously, only to get reincarnated into the world of cultivation with an unknown bloodline so powerful that it even surpassed his chest system....“Hmm, looks like becoming an alchemist might be good. System, purchase the Alchemy knowledge.”[Ding!][Congratulations Host, for acquiring Heaven Refining Alchemy Sutra.]...Follow to see the journey of how Shen Yuan creates the strongest harem since the Primordial times to journey the three thousand world.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Xavier Reaper, a high school student, was on a school trip with his classmates, when they encountered a female corpse in the middle of the deserted road. After discussing, or rather, complaining, they decide to move the body to the side of the road so that they can continue on their way.But they're in for a surprise, as Xavier goes to move the body, the corpse glows and suddenly it explodes, taking the whole of the school bus and his classmates.Not knowing what happened, Xavier finds himself chained, filthy, and looking like he hadn't bathed in a month, being transported somewhere in an equally filthy carriage with his classmates.What is going on?(The R-18 is gore scenes, so please be informed. )