Science-types Fell in Love, So They Tried Having a Fight.Himuro becomes angry at Yukimura. Yukimura refuses to feel shame for helping Kanade calm down and berates Himuro for feeling jealous since they aren’t even dating yet. Himuro slaps him and leaves crying. Everyone tries to relax at an aquarium but cannot due to Himuro and Yukimura. Himuro asks if Yukimura knows why she is upset, though Kosuke points out this is a legendary relationship question for which there is no right answer the man can give. Yukimura gives scientific reasons for her anger, including her menstrual cycle, so she hits him again...