When Cheng Yu was very young, he had met Xu Yi, who was one year older than him. At that time, Xu Yi was a soft bag who allowed others to bully others, while Cheng Yu was a middle school boy who was full of justice. So when Xu Yi was beaten, kicked and scolded by a group of people, Cheng Yu appeared in front of Xu Yi with a stick in hand, and led his brothers to scare away these bad boys who were bullying others. Xu Yi still remembers Cheng Yu's words, "From now on, brother will protect you." However, when he was bullied later, that high-spirited young man never appeared again...
Intent: a story about the other party's efforts