While searching for his fiancee Ritsuko, Sakutarou rediscovers through flashbacks the void deep within him caused by the events from his high school days.

In 1980s Kyushu, two teenagers fell in love, and exchanged their secrets and thoughts by way of sending tape recordings to each other. More than a decade later, the boy (now grown-up and bittered) rediscovers the last recording of his long-dead lover's voice. Her words trigger a series of flashbacks illustrating the joyful beginning and tragic end of their relationship.—Carrie-ko