Su Hao, who is in the second semester of his junior year, is finally going out for an internship and becoming a glorious public servant - a criminal police officer. As a top student whose professional scores were always among the top ten in the grade, internships were just as trivial as sesame seeds and mung beans. Unable to resist his mother's persuasion, Su Hao chose to go back to his home, City A, to carry out internship tasks. Su Hao, who was still drinking ice water at school and watching the freshmen standing in military postures under the scorching sun while chatting about girls with his brothers, didn't know yet that in the next six months, he would meet that kitten-like person who made him want to pull him into his arms and protect him.