"My name is Xia Ye, and I am your brother."
When her father, who flew a fighter jet, passed away unexpectedly, Gu Nian was raised by his father's fiancée and became a family member with his nominal brother Xia Ye.
She was carefree and he was attentive to her.
There is no blood relationship, but there is deep love and companionship day and night. When the boundaries of family are broken, this early summer, this secret love can no longer be hidden.