Two scientists are so stupidly in love with each other that they weaponize the scientific method to prove it, turning every date into an experiment and every kiss into peer-reviewed evidence. The comedy lives in the gap between their total sincerity about quantifying romance and the fact that they're already obviously doomed for each other. This is what happens when you let people who think in formulas actually try to feel something.

Yukimura and Himuro return to their quest to prove love through the scientific method. The two Saitama University graduate students came back from their Okinawa trip without the data they needed, and they cannot recreate the conditions of that trip. So they turn to the Biological Sciences department for help. With the aid of Chris Floret and Suiu Fujiwara, fellow grad students who have been a couple for years, they start measuring their oxytocin levels across a range of romantic scenarios. The results show their feelings falling well short of those of a more established couple. Chris then asks them what they will do if their affection turns out not to be love at all. Determined to explain the gap with science, Yukimura stakes everything on proving their love is genuine. This second season is a romantic comedy built on the clash between feelings and rigorous experiment.