The "fake show is real" love contract between the genius and aloof schoolmaster x the energetic girl, two-way secret love + growth line
"Yan, those hair ropes in your office drawer..."
"Well, the fifty-three strands you've lost since your freshman year are conclusive evidence." He pushed up his gold-rimmed glasses, "It proves that you have been mine for a long time."
"Professor Lu, there is an error in today's observation data."
"The error range is ±0%." He lowered his head and kissed her, "Because you will always be in my calculations."
"This key is...?"
"The lounge of the new observatory." He pressed her against the door. "It is built on the coordinates of our first kiss."
"Why collect meteorite fragments?"
"Because..." He put a star brooch on her head, "This way we will always wear the same starry sky."
"If one day I am no longer here..."
"I will program 'I love you' into the quantum program," he chuckled as he typed on the keyboard, "and let all the stars in the universe convey it to me."