The King of The Worlds - Volume 4: Chapter 17 - Waifu

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

High schooler Shinozaki Yuuta was just your average Japanese teen: addicted to absurdly overpowered mobile games, dodging homework, and secretly hiding a stash of very questionable dating sims. But one fateful afternoon, while grinding an infinite-wave mage survival game and crossing the street at the same time (bad combo), Yuuta meets his doom via Tokyo’s most notorious killer: Truck-kun.Next thing he knows, he’s been reincarnated... as a frog.Not just any frog—a pathetic, squishy, level-one mage frog, plopped into a terrifying world swarming with endless monsters. But the rules of the game he was playing are applyed: each time he levels up, he gets to choose one out of three magic spells, and if he picks the same spell eight times... it evolves into something absurdly, comically overpowered.After dying once, Yuuta respawns in a mysterious black space where coins droped by the killed monsters becomes a currency, where he can buy powerful frog evolutions and ancient magical artifacts. Driven by pure confidence of his ability to respawn and a desire to avoid ever dying again, Yuuta goes on a rampage, fighting monsters like a maniac until he becomes an unstoppable, world-ending, spell-flinging frog king.Bored out of his mind centuries later, he receives a strange message:> A summoner is calling. Will you accept?Curious—and desperate for entertainment—he says yes.Now summoned into a world of beast tamers and summoners, Yuuta finds himself contracted to a weak bullied boy who dreams of revenge to those who bullied him and build a harem. But Yuuta, robbed of his humanity (and a certain important organ), has no intention of helping his summoner chase girls or vengeance. What follows is a chaotic, comedy-packed adventure full of misunderstandings, magical mayhem, and the slow, reluctant bond between a horny thirsty frog (who wants to turn back into a human) and a revenge- harem obsessed kid.Magic. Monsters. Madness. Waifus. And one very pissed-off frog for not having his manhood.

As monstrous invaders ravage the world, Ryzen Kael— a man shattered by a tragedy ten years ago— faces his final moments. But just as death closes in, a mysterious system awakens within him, offering a path beyond his limits.Now, with nothing left to lose, he steps into a dangerous journey of survival and power, defying fate and unlocking abilities beyond imagination. Follow his rise as he challenges destiny itself, carving his name into history!Author's other storiesThe Unrivaled Holder: Rise of the Dragon Monarch - 3rd Season Ongoing

Zhang Ming has obtained the god-level anti-sign-in system, which can disguise the Holy Land, attract others to sign in, and draw 90% of the reward.

【Ding! Zhanhong, the son of planes, checks in at your Sword of Swords of Immortals (pseudo), and you get the Secret Scroll of the Heavenly Book·True]

【Ding! Daoist Qingquan, the illegitimate son of the plane, checks in at your ginseng orchard (pseudo), and you get Xisui Dan × 90%]

【Ding! The transmigrator Wang Hong signs in at your Tianshi Mansion (pseudo), and you get Tianshidu·True]

【Ding! The reincarnator, Chu Fan, checks in at your Nine Dragons Coffin (pseudo), and you get the Desolate Holy Body × 90%]

【Ding! The reborn Ye Xiaoxuan checks in at your Miaomu Mountain (pseudo), you get the immortal mode × 90%]

【Ding! The extraterritorial demon Wang Zanghai checks in at your lock demon tower (pseudo), and you get the water spirit bead·true]

【…】

“Young man, you have to pay taxes when you sign in, you know?”

(Book Friends Group: 710233203)

- Description from novelbuddy