IN A CITY FULL OF PEOPLE, YET FEELING COMPLETELY ALONE...Tucked away in Ikebukuro is a little shop of curios called Sonohara-dou. While there are many intriguing items to be had at this store, one person in particular visits for Saika, the cursed sword in Anri's possession. Although the visitor leaves empty-handed, Sonohara-dou is broken into in the middle of the night. Was anything stolen? Anri isn't sure, but Yahiro, Kuon, and Himeka swear to help...