After Pretending to Be a Good Boy, I Used My Deskmate as a Guinea Pig

Venomous academic master x confused science girl Chi Nianyang, a 13-year-old genius girl who skipped her first year of high school, treated her sinister classmate Shen Shuohuai as an "emotional experiment" and handed her a formal love letter. An insincere prank turned into a frame-up planned by her. When we meet again five years later, she is a newly-established scientific researcher, and he is a criminal investigation consultant with evidence in hand. In this game that started as an experiment, who is the final variable?