Pig Mai first came to Hodgget's farm as a gift in an amusement show. The animals here each have their own duties and stick to their posts. Pig Mai is just an inconspicuous member of them. Although Pig Mai seems to be stupid, he is kind-hearted and friendly. He is gradually welcomed by various animals, and the noble sheepdogs are even more caring for him. The sheepdog couple Rex and Fly are responsible for herding the sheep on the farm. Rex is used to treating the stupid sheep in his eyes in a rough way. In order to prove his worth, Pig Mai concentrates on learning sheepherding techniques from the sheepdogs. Unexpectedly, the tough tricks he learned from Rex failed in front of the sheep. Fortunately, Pig Mai gradually mastered the door and his skills improved rapidly. Pig Mai's behavior of usurping his duties was dissatisfied with other animals, and Rex was also angry because Pig Mai was praised by his master. Pig Mai is going to participate in the sheepherding competition! This incident attracted everyone's ridicule, but it gave Pig Mai a chance to prove himself.