Have you ever lost anything that was so precious to you, that if it were gone you wouldn't know what to do? For Otokawa Natsuru, that item is a keychain. Hearing from Kazama Miori, a fellow student with renowned psychic powers, that taking something precious can help with relationships, Natsuru takes her keychain on a date with childhood friend Yanagi Eitaro. But somewhere along the date, her precious keychain is lost...
