There Is A Huge Problem With My Achievement System - Chapter 61 - : We Were Tree Demons for a Period of Time…

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

Two thousand years ago, the Emperor slayed a dragon in the wild, inaugurating the era of mankind.Since then, whenever malevolent dragons wreaked havoc, heroes have always emerged as destined, allowing time to flow across a long and peaceful human world.As the century turned, the sudden appearance of individuals with supernatural abilities triggered unprecedented disturbances. People constructed a sanctuary for these superhumans in the sky, on the back of a colossal dragon, called the Dome City.One spring day, Gongsun Ce, who had just started university six months ago, encountered a hunter who claimed to be a Wuchang master.“Hey, can you really do such a thing?!”“It's quite normal, because I am a superhuman.”—Thus, the love-comedy battle of supernatural abilities in a youthful campus begins!

[Reminder: Yuri, GL, Yandere, No NSFW, Only Wholesome Romance, Toxic Heroines, Slow Paced, Slow Romance, Slow Burn, Slow Harem.]“Damn it, why the hell am I the Villainess?”Petra, a human resources manager, just went through a painfully dumb breakup. To cope? She did what any sane woman would. Binge-read a guilty pleasure romance and smut novel series from her teenage years, only to realize that the heroines have brain-cell-deficiency.One way led to another, she wakes up as Verena D’Auvergne—a minor antagonist who turned out to be the ultimate villainess of the whole series after an incident. The very woman who stole all the love interests and died trying!“Forget the male leads, I have to make the heroines forgive me!”Can she, the ultimate villainess, capture the forgiveness of the very women she was meant to destroy? Or will the cursed System, and fate itself, force her to chase after love?

ICUWSA, the most popular web novel with the most loyal fan base that could be mistaken for an occult group.Out of all those fans, Seoyoung could proudly say he was at the top. But everything comes crashing down in one chapter.Just his normal boring day life but one chapter was enough to distort it.The death of the Protagonist. This one fact makes Seoyoung furious and he decides to abandon his boring life.“Today will be different.”As soon as Seoyoung calls his boss and quits his job, a new breath of life fills his lungs, but not for long.The world glitched, and in the next moment, he wasn't there anymore.“Where am I?”He wasn't on earth anymore; he was in the body of a no-name character in the first arc of his favourite novel.Noctis Academy.Just another extra like him, destined to live normally and maybe die after the academy.But he is determined not to live by the story but to break out of the shell of society and live a life worth living.“Just another extra. No, I don't think so.”Given a second chance at life, Seoyoung, now Kaiser Vanguard must navigate his way through this new world. Breaking the chains that bound him. While questioning the reason for this new life.“You can start the journey from the auxiliary chapter.”