理科生坠入情网，故尝试证明。[r=1-sinθ]♡

During the Okinawa training camp, on a bridge where the morning sun's crepuscular rays created the ultimate romantic atmosphere, Yukimura and Himuro shared a kiss of the highest theoretical value. However, due to insufficient saliva sample collection, they decided to re-measure. To consult an expert in saliva testing, the group headed to the Faculty of Life Sciences in the science and engineering department. Before them appeared a stunning woman named Suiu, dressed in oiran attire with pure white robes, and her lover, Chris. Yukimura invited Suiu and Chris to help them complete the "experiment to prove their love," only to witness the overwhelming aura of love emanating from Suiu and her partner...