Inverse Summer and Echo

Male Protagonist 1: Jiang Xu - a transfer student who appears to be taciturn and has the highest grades, but is actually burdened with the stigma of "academic fraud" (framed by a former school friend). He transferred to another school to avoid public opinion and secretly collected evidence to prove himself. He is good at logical reasoning and keeps a distance from people. He is only obsessed with the second-hand bookstore in the old town. Second Male Protagonist: Xia Yu - a popular figure in the school and the captain of the basketball club. He has a sunny personality but hides his inner thoughts (his mother is seriously ill and needs huge medical expenses, so he secretly sings in bars to make money). He seems to be very popular, but in fact he never shows his sincerity to others. Plot bond: The two crossed paths due to a "library misunderstanding" (Jiang Xu mistakenly believed that Xia Yu was secretly hiding key reference books, and Xia Yu was dissatisfied with Jiang Xu's indifferent attitude). Later, the teacher forcibly arranged for the two to form a team to participate in the "campus academic + practical" two-person competition, and were forced to bind.