It is Kotoko's birthday and Irie takes her out for the night. Irie and Kotoko are very 'lovey dovey' in this episode. Irie and Kotoko pull an all-nighter at the hospital as a lot of emergencies came in, Kotoko stayed even though she seemed to have a fever. When Kotoko returns home in the morning, Oba-chan looks worried over her appearance and asks her if she's alright, Kotoko thinks she's running a slight fever, but Irie asks everyone to wait a moment, he asks Kotoko if she's pregnant, Oba-chan and Yuki both get a shock and yell 'what!'.The episode is left at a cliffhanger. (thetvdb.com)