Science Fell in Love, So I Tried to Prove It - Season 2 Episode 2
Science-types Fell in Love, So They Tried Looking for a New Theory.

Yukimura and Himuro even kissed, but due to the amount of oxytocin in saliva, they were defeated by Chris and Midori. The impatient Yukimura offers Chris and his colleagues a control experiment again. However, during the experiment with the Yukimura-Suirain pair, Yukimura was tempted by Suirain and stretched out under his nose. Himuro, who was watching it, experimented with Yukimura again, but she was completely disappointed, and the two developed into a silly story. Chris looks down at Yukimura with a frosty eye and is amazed that he is disqualified as a man.