I drank too much coffee, finished the game missions, and had nothing to do in the dormitory, so I decided to explore the new campus building at night. But the new courtyard building is full of weirdness, and the three girls accidentally traveled to a strange country. How can they gain a foothold in a strange society? This article rejects the bloody Mary Sue. Although it is an old time-travel joke, it strives to present the most realistic time-travel state. How will they use their talents in this new country, what kind of lovely people will they meet, and what kind of stories will happen?