I Became a 6★ Gacha Character - Chapter 481 - 60th Floor Battle Royale 1

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

3000 years after his disappearance, Xue An had undergone cultivation and came back as an invincible fairy. But upon his return to Earth, he realised that he had a pair of twin daughters.

“Papa, this dragon doesn’t taste good!”

“Oh, this must be an ancestor-grade dragon that has lived for much too long. Its meat has become a little dry. Next time, we shall eat a young dragon within ten thousand years of age.”

Some dragon that had existed since the beginning of the universe was lying on the floor, trembling and shivering.

“Papa, between you and the other Immortal-emperor mannies, who is more powerful?”

Xue An smiled. There was not a single soul that could withstand even just one blow from him. If there was! That would at most be two!

“My dear daughters, I will make you girls the happiest princesses in this whole, wide world. No, in this whole universe! And it’s the two of you!”

Kawaki, who was born in the dragon vein of a planet (Altana), first met Umibozu who was traveling in the universe, and his girlfriend, Kouka.Later, he came to Earth by accident and met the teacher who affected his life —Yoshida Shouyou.He also met a group of friends. The most conspicuous among the group of friends is a fool with silver hair and naturally curly hair, a short man with purple hair, and a little devil whose catchphrase is “Not Zura, it's Katsura!”Gintama Doujin, not transmigration.