A woman writes a letter to a young man, leading to a correspondence with his father that unveils the truth of a 24-year-old high school romance, his son's death, and the power of love letters.

• TOHO
• Haruka Ayase
• Ami Touma
• Kanata Hosoda
• Satoshi Tsumabuki
• Takuma Otoo
• Miu Tomita
• Airi Nishikawa
• Masaki Suda