In the summer 2005, an old gentleman began to talk about a "sixty years ago story" to the school study trip students in Hiroshima Peace Memorial Park.

It was a story about three sisters and one brother, when residents' houses, offices, shops restaurants, hospitals, schools, temples, hotels,... were used to be there in around the peace park.

"Shinobu" as the eldest sister of Yajima family, was running her Yajima-Ryokan which was given from her dead parents.

The second elder sister, "Nobuko" was teaching at primary school as a substitute teacher, she has wished to change something, even during the war.

The youngest brother, "Toshiaki", loved flowers and animals, sweet, kind and good boy, but he had been called into the armed forces.