Season Plot

Shinya Yukimura and Ayame Himuro as they continue their scientific quest to prove love, this time seeking help from the Biological Sciences department to measure oxytocin levels in romantic situations. Their experiments lead to new questions and complications, particularly when they encounter other couples with seemingly more "mature" relationships and a colleague who puts pressure on them to consider the possibility that their feelings might not be "love" after all. The season also introduces new plot points, such as Kanade's unrequited crush and the development of other characters like Kosuke and Ibarada.