Director Shimura Maru certainly didn't summon Chen Yu to her office because she had a personal interest in him. Despite being single, she was famously known for her propriety throughout the medical community in Tokyo.
Originally the top graduate from the University of Tokyo Medical Department, many professors wanted her as their lover, but no one succeeded. This reputation of Shimura Maru's not only withstood some suppression but also brought her unexpected benefits. At least, becoming the head of Eastern University Affiliated Hospital, her good reputation was one of the important factors considered by the board.
"Please have a seat, Professor Chen, I'm not one for empty formalities," Director Shimura Maru gestured for Chen Yu to sit wherever he liked while also personally picking up two paper cups and pouring tea for both Chen Yu and herself: "It's not much, just tea leaves my mother sends me from the countryside. If you don't mind, please give it a try."