Nanako Saeki  

, 佐伯 奈々子

Nanako Saeki is an intelligent and well-liked girl who has a lot of admirers, including Takao Kasuga. One day, while changing clothes at the gym, she accidentally leaves her outfit on the floor. It gets stolen by an unknown person, likely a pervert. Despite this setback, Nanako remains cheerful and continues to date Takao. However, things take a turn for the worse when Nakamura keeps meddling in their relationship.