In his previous life, Ye Bai died a tragic death after offending the rich second-generation heir Lin Feng while trying to save his beloved, Xia Yubing. Lin Feng and Yan Shuya had conspired to murder him. After being reborn, Ye Bai activates the Little Mouse System and becomes a hamster in Room 308 of the women's dormitory. He must accumulate 10,000 points to regain his human form. While using his tiny rodent body to play pranks on his enemies and secretly protect Xia Yubing, he also takes on human form for brief periods each day to expose the schemes of Lin Feng and Lin Tian. With the system's help, he becomes the talk of the entire campus. When Xia Yubing unexpectedly discovers that the little hamster is actually Ye Bai, the two join forces to earn points, repeatedly humiliate their enemies, and rise to the pinnacle of fame, fortune, and life.