Pop has been dependent on his father since he was a child and lived in poverty.When he was 16 years old, his biological mother wanted to remarry, to a senior military official.On the other hand, Hero, a second-generation military officer, has always been resentful of his father because of his mother's death. When he learned that his father was about to remarry, he even resisted all his father's arrangements and asked to transfer to an ordinary school.The new semester is here, and these two brothers with conflicting emotions are assigned to the same class.Due to a coincidence, the two became friends from enemies, and then gradually developed different feelings.