Ryujin is a popular university student. She has many friends, makes connections easily, and is always at the center of attention. She plays the guitar, sings, and often becomes the soul of parties, which makes her well-liked by both classmates and professors.

Yuri is a freshman who has just entered the university. She is looking for housing and hasn’t yet adjusted to her new surroundings. Everything feels unfamiliar to her: the campus, the people, and the rhythm of student life.

Recently, Ryujin parted ways with her previous roommate, leaving her room available. Yuri, in search of a place to stay, happens to come across this opportunity.