Academy's Silver Gatekeeper - Chapter 21

At his best friend’s memorial service, Bai Yan almost burst out laughing and got beaten to death.

Along the way, Bai Yan’s fits of laughter turned into ones of anger. His joy quickly turned to sorrow as he met his punishment that night.

He curiously opened the app that he had never seen before on his phone and was suddenly pulled into a terrifying world of reincarnation…

An infinite stream of horror flowed into his mind, ominous descriptions, breakthroughs, and storylines.

The main character should not be taken lightly. Be careful if you dare!

Jing Yan, a once top-performing genius of the Jing Clan who broke through the rank of Ninth Heaven of martial arts and entered the Precelestial Rank at 16, was second to none in Dong Lin City. Yet out of nowhere, his rank dropped dramatically after he was enrolled in the Wind God Institute and became the object of ridicule.After breaking the seal of The Ring of the Universe, Jing Yan was reborn. He finally became the conqueror of The Mainland of Tian Yuan and became the man countless warriors looked up to.

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

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.