Seto Toshiki will be playing Hino Shunya who is Chinatsu's childhood friend and her crush. However, he fails to notice Chinatsu's feelings and falls in love at first sight with Rumi. Kiyohara Sho will play Hishikawa Takumi who was Rumi's first love and works as a pediatrician at the same hospital where Rumi is having her practical training. He becomes smitten with Touno Fujika (Sato Honami) who is a mysterious girl also in Rumi and Chinatsu's class. Sakai Miki plays Saeki Noriko who is a mother of two and in the same class of Rumi and Chinatsu while Yanagisawa Shingo plays Yamada Kenji, who raised Chinatsu and her sister singlehandedly and is the owner of a Chinese restaurant. Sakakibara Ikue plays Rumi's mother Kizaki Tomoko who encouraged her daughter to attend nursing school.