Science student falls in love, so try to prove the second season

During their stay in Okinawa, on a bridge with the highest atmosphere value due to the light from the rising sun, Yukimura and Himuro had the theoretically highest kiss, but since the amount of saliva collected was not enough, they decided to measure again. In order to visit experts in saliva testing, the group set off to the School of Life Sciences of the Ministry of Science and Technology. What appeared in front of them was Cuiyu, a beautiful woman dressed in white as an oiran, and her lover Chris. Xuecun invited Cuiyu and the two to help them complete the "experiment to prove their love", but he got to know Cuiyu and the others' overwhelming love aura...