The story takes place in a key middle school in a medium-sized southern city. Lin Yu and Zhao Ran, sophomores in high school, have completely different personalities and families, but they become besties because of their shared love of basketball. The transfer student Su Xin accidentally broke the balance between the two and integrated her secret into this pyrotechnic group. Friendship, secret love, misunderstanding and struggle among the four people unfold in an intertwined manner. The first volume depicts their acquaintance, small frictions and tacit understanding between them; the second volume focuses on campus hot spots and family changes, challenging personal limits; the third volume faces the test of friendship and love under the contradiction between dreams and reality; the fourth volume focuses on the college entrance examination sprint and the youth farewell night. Everyone ends each other's youth with laughter and tears. The story contains the passion and comedy of college campuses, as well as the pain and honesty of growing up. It has ups and downs along the way, but is compact and bright. In the final chapter, everyone strives to rush to their own futures, and looking back, they find that the most important thing in youth is actually companionship and self-growth.