(A little mix of LLFTX) 18 year old Ariana Hanasaki is in her first year in college. She still gets teased by her classmates which is why she has anxiety. Her professor, Mr. Kamui invited her out to dinner to cheer her up, but that's not the case. It was scheduled to be her last day on Earth, but she begs the devils to give her 10 days because she wants to see her older sister get married. During that time, she develops a friendship with the devils.