伊藤ちひろが自身の同名小説を映像化した本作の主人公は、人とうまくコミュニケーションが取れない歯科医師ススメ。劇中では、彼がマッサージ店で働く宮子に恋をして思い悩み、宮子の身に起きたある事実を知るさまが描かれる。。A 16 year old boy who had thought that his father's death was an accident, suspects otherwise when he receives a 10-year-old lost letter his father had written just before his death.。