A pair of cousins go to the star island because their teacher said: “the only way to know an opinion is right or not is to do it. “. professedly, they go to the island for detecting the survival skills they have learned in the home. But the younger sister, named Keiichi, wants to escape the life that is designed by adults. The older brother, named Asano Ritsu has a desire to be a hero.

when they are on the boat, Ritsu accidentally throws his food into the water, so Keiichi shares her food with him. In order to have fun, the sister says: “you can give me fishes to compensate me.” the brother quickly says: “I will teach you how to catch a fish rather than give you a fish.”

It will take 24 hours to star island, now the weather is very gloomy, Keiichi recalls the day when her mother was burial at sea, mother drifted away, what is just they in the boat. Ritsu says his ambition, his hatred for zombies. Staring at the mountains, “the star pointing is our island, the end is star land. If there were no obstructed mountains, I will save a lot of time. ” Keiichi thinks.

The pair of cousins fight with zombies, whose action is quick, auditory sense and sense of smell are sensitive. In the mouth island, because of the lack of materials, children are taught Karate by teacher Mr.Hayashi for survival.

Because they had to eat not enough food, so they are faintness to hold the baseball bats. A zombie with gloves chokes Ritsu, Keiichi helps him. But unfortunately, she is caught by an ugly zombie, who wants to beat her. The only thing she can do is prayer, she prays: God gives me strength, gives me hope, please! Everything is suddenly silent. A man, with light skin and cold undertone, saves her. When they leave, Ritsu shows disdain for the no self-awareness animal: “humans can not create a race that is smart than themselves. Monster!”

In the elevator, Keiichi introduces herself and Ritsu, when she asks who they are, the man says do not know, when he opens his eyes, he is in there. Ritsu lies that he and Keiichi are brought by the storm waves.

The mysterious man says they know their race called human beings.

He admires their intelligence, creativity, and he wants to touch her, she makes him not feel perplexed。”What is your name?”Keiichi asks.

“I do not know,” the man says: “you can call me what you like. “

Keiichi thinks a bit time, says: “My name is Keiichi, which means the light of a firefly, I want to call you Nakatsuki, it means the light of mouth, the second mouth. “

 Ritsu says: “Tadayoshi, Asano Takayoshi. It sounds better, is not it ?”

They all laugh.

When other people leave, Ritsu checks Keiichi’ wound,

Keiichi asks: “what should we do ?”

Ritsu replays: “we need to know what they want to do, it is a good chance, they are not as smart as us. We can give them a little benefit, at the same time, which can provide our basic survival needs, like food, water.”

Keiichi agrees with him.

And they maybe tell us lies, it can not be possible they do not know where they come from. we should be careful. 

Next day, Nakatsuki introduces them to a woman named Kisei, Keiichi finds she is also with gloves. the cousins show how to recognize a medicine, how to use diesel generator to illuminate a toy store. Ritsu says: “It is a huge work, but everything should be clean for health.”, he teaches them as a patient teacher. Kisei directly says: “They can help us.” Keiichi sees zombies are searching for something,

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 she is shocked and says: “they are dangerous and will attack you!”

“No, they are obedient to us.” Nakatsuki says.

“What have you done?”Ritsu says.

she looks at Nakatsuki and says: “We are sad for their death and bury them.”

The cousins gaze at each other and say nothing.

When they back home, Nakatsu and kisei are happy, just like children who found friends and games.

Ritsu says: “We lived on the island, the island calls star island. As you saw, our ancestors created zombies, they were human, but they killed us. They are our enemies.”

Nakatsuiki says: “That is your fault, not them. “

The cousins do not want to refute them at this time. They have not suffered panic, separation, frightening, and they know less about this world than them.

“They are weird, zombies do not attack them, they seem to study our world recently. ” Keiichi says.

“where are they from? from other planets?” Ritsu says.

“It is true or not, we should explore our land to evaluate the situation. “

They take guns from the government building.

They find a young girl with gloves, she is passionate about staying with them, So it is unnecessary to hold the gun.

In the street, the cousins found the knowledge of the young girl is elementary school’ level. she is interested in everything she saw. And the ability of study is high. because of her, the zombies do not attack them.

The city did not change, it just is mess and lifeless.

“They do not manage the city, what do they want?”Ritsu asks.

“I am confused, too. Maby they have arrived here recently.”

she looks at the young girl.

Ritsu brings Keiichi to her home, Keiichi is happy and find her favorite camera.

Nakatsuki enters Keiichi’ room and he brings a lot of things, like a phone, a 4-D Rubik’s Cube with an instruction, and lots of comic books.

“How can I use this?” he asks a question about the phone.

“It is an advanced technology, We need many people to work together. ” Keiichi answers.

“They can help u…” he suddenly stops.

Next topic.

“could you teach me how to work out?” he holds the 4-D Rubik’s Cube.

“It is difficult for me, too. But we can learn together.”

“There are various ways to finish it, But the correct answer is only one. We do all thing is just for it. ” she gives him the restored Rubik’s Cube.

“Thank you, my teacher.”

He spends less time than me to learn it.

He gives me several books. “I love it.” he chooses a book named From the new world. He pushes it to her. But Keiichi is attracted by the Tattoo on back of his neck, it is ‘Jin’.

Keiichi does not listen to him, which made him disappointed.

She recalled what her cousin said.

She says: “In our society, trust and cooperation are imported.”

She does say another word “obedience”

“I will always trust you, my dear teacher.” Nakatsuki says.

Ritsu comes back with a list of a notebook, he gives it to Nakatsuki,and says: “I know you want to know our civilization, you can learn with this order.”

“Thank you.” he says.