Hisako and Ryohei, a sister and brother, live alone in a small fishing village. One day, Ryohei, who has doubts about his birth secret, reads his mother’s left diary to find out that his biological father is an American soldier.
Just then, Hisako gets a boyfriend, which makes Ryohei feel a distance between them.
1973/9/17 Serialized in Shukan Shonen Champion (Akita Shoten)
This short story featured a tragedy that the Pacific War brought to people in Okinawa. It also warned people about the environmental destruction approaching.
Tezuka tried to convey his messages by revealing the fate of a sister and brother who had to live isolated from others, and the reason for their mother, who lost her life at sea.