Ayame Himuro, a graduate researcher at Saitama University's Ikeda Lab, confesses to her labmate Shinya Yukimura, and the two decide that love, like any hypothesis, demands experimental proof. They design protocols measuring heart rate, personal-space tolerance, and the statistical significance of wall-slam scenarios, dragging their labmates Ibarada, Kosuke, and Kanade into increasingly absurd trials. Every date becomes a data-collection opportunity, and every result raises more questions than it answers.