In the wake of Hurricane Katrina, New Orleans handyman and blues singer-songwriter Gabe Recolte was left homeless before he had the chance to express his love for club owner Hattie. Oliver and his team retrieve Gabe's love letter years later and face challenges in solving the mystery.

The first installment in the story of teenage classmates Naho and her friends and mysterious letters from the future, all concerned with events unfolding around a new transfer student, Kakeru, who recently moved from Tokyo to Nagano.

The sixth installment in the story of teenage classmates Naho and her friends and mysterious letters from the future, all concerned with events unfolding around a new transfer student, Kakeru, who recently moved from Tokyo to Nagano.

The fourth installment in the story of teenage classmates Naho and her friends and mysterious letters from the future, all concerned with events unfolding around a new transfer student, Kakeru, who recently moved from Tokyo to Nagano.