One morning, Sakura (Hoshino Mari) noticed that Touki (Imai Hiirato) looked a little strange.He seemed distracted, his eyes drifting into the distance.That day, Tohui did not appear on the only way to school.Instead of going to school, he went to the home of his grandmother Yuri (formerly Hinodeko).

Because of what he said during the barbecue, Tohui began to care about his father and looked for his traces.While looking through old photo albums, he stumbles upon Sakura's old diary.There were unknown secrets recorded there, and Touki was shocked.

That night, when Sakura returned home, she found that Touki, who was supposed to be home, was missing.Sakura hurriedly contacted Moe Yin (Kato Rosa), but...