Pythagorean Is Not a Theorem

He once said to her, I2+U2=love2, this is the formula of my love for you, triangle-like love, solid original intention, she believed it. But when he told her that he had found his true love, she was heartbroken and cowardly fled from this extremely sad situation. Three years had diluted her feelings for him, but he missed her more and more. In fact, the day she left, he had clearly realized that she was still the treasure in his heart. But when he stood in front of her, she said to him, in my heart, Pythagorean is no longer a theorem. How many three years will it take for the love between Zheng Chuxi and Gu Momo to come to a perfect end from school to the workplace? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.