The engineering dog Wensu traveled through time and became the unpopular eldest daughter of the Anyuan Hou Mansion. Good news: He is still alive and has a princely fiancé as a gift. Bad news: On the first day after wearing it, she was packed up and kicked out, along with a sincere letter of termination of engagement. Wen Su: "..." Okay, just break off the engagement, and the next one will be better. With the "breakup fee" given by the Hou Mansion, she turned around and opened a girls' school in the capital. Music, chess, calligraphy and painting? What is that? Can it be eaten? Introduction to geometry, accounting principles, basic chemistry... Do you want to know? Our goal is - technology changes life, knowledge realizes the dream of a rich woman! The academy is flourishing, and the lady of the general's family who has broken her leg creates a crossbow/arrow that can fire continuously by relying on the drawings she drew; the daughter of a merchant who is on the verge of bankruptcy uses double-entry bookkeeping to revitalize the family's business. Wensu prepares lessons and educates people every day, and her life is very nourishing. Until that day, her former fiancé, His Highness the Crown Prince, brought a divorce document and led a group of powerful people to the scene aggressively, ready to watch her cry and regret. As a result, he opened the door and saw the enemy prince who was rumored to be decisive and ruthless, holding an introductory calculus book and asking Wen Su for advice with a pious look on his face. "Sir, can you tell me the derivation rule here again?" Prince: "???" Wen Su adjusted his non-existent glasses and said calmly: "Jumped in line, this classmate, queue up at the back. Your Highness, just leave the divorce letter over there, I'll read it after class. Please go out and close the door, so as not to disturb my class, thank you." The prince looked at the room full of symbols and formulas he didn't recognize.