Lu Jingxing, a "gangster" seventh brother who seems rough and unruly but is actually affectionately protective, has been protecting the good girl Shen Qinghuan who was bullied at school for ten years because of a trivial act of kindness - Shen Qinghuan returned the extra ten yuan. The two bridged the gap in age and status, grew up together in each other's protection, and finally came together.
