The sweet-looking high school girl Kudo Sayega (with a village frame) is not popular with her father at home, who is determined to train his brother to become a baseball player and neglects to take care of his daughters. Shayejia's high school has an internal enrollment system, so she eats, drinks and plays with her little sisters all day long, and her studies fall to the bottom of the grade. The gentle and hard-working mother (Yoshida sheep) is often called in by the school to preach, and she is so anxious about her daughter's future that she sends Shayega to a cram school run by Pingtian (Junshi Ito). After a proficiency test, Shayejia is actually only at the level of the fourth grade of primary school, but the cheerful and confident Pingtian doesn't care about it. He opens the girl's guard in a unique way, and the two soon become good friends. With the help of Pingtian, Shayejia gradually developed a strong attitude towards learning, and later made a grand wish to be admitted to Keio University. This is the true story of the counterattack of the ugly duckling. The film is adapted from the story of "the lowest Spice Girl in one year's deviation increased by more than 40% and admitted to Keio University". The book is based on a true story and was written by Hideki Hirata, a private school teacher who is the protagonist of Kobayashi Shayega.