Chaos Heavenly Emperor Technique - Chapter 12 - 0: Shattering Star Sword Technique!

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.

After Reincarnating into Naruto World at the Warring State Era as an Uzumaki, Masahiko thought that he got a useless System. He lived for 48 years as a normal, below average Uzumaki Shinobi.

That changed when he finally knew how the system works the day of his 49th Birthday!

- Description from Novelupdates

For He Gu, to be secretly in love is like a strong alcoholic drink. Obviously, once it flows into your system, dizziness, the loss of self-control and suffering will follow closely by, making it possible for anyone to be fatally attracted like moths to flames, and willingly endure the hardships.

While you made sure to not overdo it, I’ve become completely intoxicated…however, for every intoxicated feeling, you will inevitably wake up from it one day.

When Song Ju Han continued to act childish and recklessly destroyed He Gu’s tenderness for him, he had never imagined that the man has already been written into his destiny. Even more, he had never imagined that—the person brought to him by destiny—would one day want to escape…

Zhong Li, an orphan in the 21st century, was wondering how to collect the fees for his college study on the street, when he was suddenly hit by a car, which threw him into a river. An orphan’s disappearance would not bring too much attention to the world, but this accident gave Zhong Li another chance of living a glorious life in an immortal world. When he woke up, he found himself lying in a magnificent yet strange palace built of all gold, but had no door. An immortal claimed to be his savior and wanted to train Zhong Li with all of his cultivation methods, only because he was too lonely and wanted a disciple to keep him company. When Zhong Li finished his study, the master would tell him how to go out of the palace. Zhong Li never thought that the path to immortality would bring him to the fate of becoming a dragon.

- Description from Novelupdates