Bloodline of Gods: The Genius at Olympus Academy! - Chapter 79 - . Emperor

The world of an NPC born inside an online game was destroyed. Reborn in the real world, he gains a second chance. However, the monsters followed and destroyed he died again. Julian believed everything was over, only to have regressed to the day the game launched. Julian returned to Avalon not as an NPC, but a Player.Avalon's Fall was a VR Online Game created by the goddess.A game to help humans fight back against the six devils. She granted the Players a chance to evolve and enhance themselves in the real world. Because of his fragmented memories, Julian discarded his past. He then focuses on survival and happiness instead of saving the world. There were only two months before the first devil started his attack on the world.Thanks to the perk of his SSS-Rank Class Shadow Mancer and saving his ex-girlfriend, a powerful Sword Master, Julian changes the future. He took a different path, allowing him to surpass anything he ever imagined.Given the power to summon an army of undead in the form of shadow warriors. He overcomes the demons of his past. Supported by his party, they struggle to survive in the collapsing world, desperate to survive.The Devils eventually discovered his true potential and focused their gaze upon Julian. A title given to one existence, he who would rule over all darkness. The Heir of Shadows. The 13th Divine.Erebus.

“I'm going out to do something, so I can't take care of you any more. You can go down the mountain and have fun. But if you can't find someone who matches your Innate Pure Yang Body in three years, you're finished!”These were the last words the old man, who was Lionel Yeager's teacher, threw to him before he vanished. Meanwhile, having mastered most of his master's skills, Lionel Yeager went down the mountain and took his first step into civilization for the first time in years.With his unparalleled medical and martial arts, he sets forth on a journey, befriending new allies and crushing all the enemies that stand in his way, as he attempts to resolve his Pure Innate Yang Body constitution, and cultivate to the top of the 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

My Beautiful Teacher tells the story of a university graduate Qin Chao who can’t seem to find a job and is in a downward spiral in his life. Then one night as he walks home from another failed job interview, a vase hits his head, making him get possessed by an old and powerful evil spirit sealed in that vase and following another incidents, inadvertently saved a mysterious university teacher Su Ji, thereby opening his path to cultivation, he also manages to get a job as a security guard at Guangyuan School. A series of adventures then took place as he deals with all kinds of supernatural beings.

- Description from Novelupdates