I Just Became a Thousand-Year-Old Snake Demon, and the School Beauty Wants to Marry Me?

Xu Junan traveled through the fantasy world and started practicing as a red snake. Thousands of years passed like this diligently, and he finally survived the tribulation period. But just when he was about to turn a snake into a dragon, he was suddenly summoned. ... My name is Lin Yanran, and the world I live in is very dangerous. An unknown demon cave has descended, and there are countless terrifying monsters inside. In order to save themselves, humans developed a contract beast. Everyone can start a contract when they are 16 years old, thereby gaining powerful power. It's a pity that I am a waste and my contract has not been successful for a long time. At this moment, I accidentally obtained a forbidden secret technique that could forcibly bind a contracted beast. The price is that I will become the slave of this contracted beast and form a kind of Taoist companion-like existence with it. That's all. Xu Junan, who was originally preparing to survive the disaster, was summoned. Xu Junan: You are so awesome that you are so hungry that you won't even let a snake go? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.