This chapter opens with a brief introduction to the protagonist, who introduces himself as a former student of the protagonist's school. The protagonist is introduced as "Chai Xiao" and is introduced to his former roommate, who is now a professor at the university where the protagonist works. The two of them have been friends for many years, and they used to share a bed together when they were students at the same university. When the protagonist was a student, he and the protagonist used to sleep together in the same bed, and the two used to joke about what happened after the protagonist slept, which was inappropriate for a little girl. The professor tells the protagonist that the university is holding a garden party, and that he and his friends are invited to attend. The party will be held in the courtyard of the university, and all the students are required to wear costumes to enter the party, which is held in accordance with the university's rules and regulations. After the professor leaves, the protagonist wonders why the professor is blocking the protagonist from entering the party.