Yosano Suzu (Mei Nagano) grew up in the countryside freely since childhood, with a naive and cheerful personality. Suzu was admitted to a high school in Tokyo, which means that she will leave her parents and go to this prosperous and fashionable city to start a new life alone. However, this life did not seem to go smoothly at the beginning. On the way to her uncle's house, Suzu fainted. Fortunately, she met a man named Shishio Satsuki (Shohei Miura). Suzu was surprised to find that there was a familiar mole on the back of Shishio's neck. When she came to school the next day, Suzu found that Shishio was actually her class teacher. After that, she also formed a friendship with Mamura Daiki (Alan Shirahama) who sat next to her. As time went on, the relationship between Suzu, Shishio and Daiki gradually became ambiguous. Caught between the two men, Suzu didn't know what choice to make.