Qinglan Girls' High School, a top girls boarding school known as the "daughter country in the ivory tower", is famous for its strict school rules, all-female teachers and students, and the elegant school spirit that has been passed down for centuries. In a campus where no boys have ever set foot, due to an unexpected "student status change", an ordinary boy named Zhao Dong, under the pseudonym "Zhao Dong" and as a "distant transfer student", was forced to hide his gender and break into this purely female world.
He tightly wrapped his baggy school uniform, lowered his voice, carefully concealed his Adam's apple and short hair, and struggled to survive in an environment full of fragrances, skirts and whispers: he had to deal with the sudden menstrual period discussion in class, avoid the gender crisis during dormitory check-in, and deal with the girls' delicate sensitivity and jealousy disputes. However, under the disguise, he not only discovered the secrets beneath the glamorous surface of the girls' school - Covered-up campus bullying, secret operations by the privileged class, the dusty past of the old teaching building, and gradually breaking down prejudices and barriers while getting along with girls with very different personalities: Su Qingyuan, the student union president who is cold on the outside and hot on the inside, Lin Xiaoyu, a carefree sports girl, and Xia Zhiwei, a sensitive and fragile literary girl. They either doubt his identity, are moved by his sincerity, or have an ignorant relationship with him.
When the risk of his identity being exposed looms, he chooses to protect the people around him in his own way, breaking the century-old rules of the girls' school. In this destined to be an extraordinary "journey of disguise", he completes his own growth and redemption, and also brings unprecedented changes to the Blue Girls' School.
