Shinya Yukimura and Ayame Himuro are brilliant students at Saitama University. Himuro suddenly confesses she is in love with Yukimura who, unsure how to respond, asks how to define love. Himuro presents mathematical evidence, such as the number of minutes she spends staring at him and her increases in heart rate. Their conclusion is that love is based on a mathematical formula. Fellow student, Kanade Kotonoha, worries they have gone mad...