As Promised in the Second Grade, You Really Survived the Tribulation and Became an Immortal?

Xia Feng, an ancient monk who had been in seclusion for many years, woke up from his deep sleep and found that the outside world was already in the 21st century with many tall buildings. He came to visit his old friend, only to find that he had returned home long ago. Knocking on the door, he was greeted by a beautiful high school girl named "Li Qingning". The beautiful girl looked surprised: "Do you know my grandfather?" … My name is Li Qingning, a modern girl who believes in science and opposes superstition. But one day, a young man wearing a simple gown suddenly came to visit and said that he knew my grandfather. He also introduced himself as a thousands-year-old immortal cultivator who casually saved my grandfather decades ago. Now, he has no place to live and plans to stay at my house for a while. I always thought he was just a middle-aged boy. Unexpectedly, after a while... He really overcame the tribulation and became an immortal in front of the whole world! … This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.