Element Continuous Tense: Prevolume: Begins with Transformation

(Light science fiction + light magic + fictional city + campus love + childhood sweetheart living together + single female protagonist) (Knowledge pours into your brain in very strange ways! Warning!) Do you think that the boy who controls the hydrogen element, the source of all things, will meet a beautiful girl of chlorine element who lives in his home... "Do you... Know about the Elemental Family?" That day, the girl blinked her emerald green eyes and asked him. It wasn't until that moment that he realized that his life, which was invisible to everyone, was about to be shattered. "You mean, we can have two chemical techniques?" "I guess there are more than two... Hydrochloric acid, calcium oxide, water... Maybe there are others?" "Xiao Yuan, I got you involved in this kind of thing... Well, I'm sorry." "Xiaohan, what are you talking about? Aren't we family?" Let us follow in the footsteps of the commoner (?) Boy Xu Qingyuan and the elemental aristocratic girl Lin Menghan, and enter the Lixing together to unite the federation.