Zhang He is an ordinary Nan high school student with a petite stature. He sometimes dreams of having a harem of 3,000 beauties. On his 18th birthday, his mother gave him a wishing stone in the hope that he could make a wish to go to college. As a result, he made a wish and went to the magical world, which is full of monsters and other weird things. How will Bean Sprout encounter his "back gate"?