High school girl Futaba Yoshioka (Honda Tsubasa) deliberately makes herself look unkempt to avoid being attacked by other girls. She has to deal with this carefully every day and worry about it. One day, she unexpectedly meets a boy named Tanaka Kou (Higashiide Masada) who she had met in junior high school. Tanaka moved to Nagasaki, and after the reunion, not only did he change his last name to Umabuchi, but his personality also seemed to have changed dramatically. Taking the class activity as an opportunity, Futaba, Umabuchi, Umabuchi's friend Aya Kominato (Yoshizawa Ryo), the maverick and cold girl Murao Shuko (Shinkawa Yua), and Makita Yuri (Fujimoto Izumi) who was isolated because of her cuteness, gathered together. Originally their emotions were intertwined with each other, and the talented handsome boy Kikuchi Touma (Chiba Yudai) in the next class, teacher Tanaka Yoichi (Koyanagi Yu) and Mabuchi's old friend Cheng Haiwei (Takahata Mitsuki) in Nagasaki made the relationship between the boys and girls more complicated, so it added countless troubles ... This film is adapted from the original work of the same name by the cartoonist Sakisaka Io.