High school senior Mio Segawa becomes pregnant with her boyfriend, Nagisa. Unable to confess her pregnancy to Nagisa or her family, Mio confides in her best friend, Natsumi. Despite facing various challenges, Mio decides to express the feelings she had never put into words and heads toward Nagisa. Set in the UNESCO World Heritage city of Kumano, this story delicately depicts the past and future of those living in this town, showcasing the emotional connection between a young couple.