Aether and Lumine are time travelers who can travel through time as well as the power of flying. 

Aether is brave and mature. Lumine is Aether's twin sister. She is clumsy and cute. The twins are very special.

One day, they were travelling through time. 

You don't need to know who I am, but I want your power!

The unknown God appeared and said to the twins, "your journey ends here."

The twins questioned, "who are you?"

The God said, "You don't need to know who I am, but I want your power."

Lumine was angry and fought with the God. However, she was clumsy and fell down. The unknown God took her and left. Aether was worried. 

hahaha, no way unless you beat me.

Come out! give my sister back to me.

Aether came to find the unknown God in where he lived. 

Aether shouted in front of the gate, "Come out! Give my sister back to me!" 

The unknown God laughed, "hahaha, no way unless you beat me." 

"Then, let's have a competition. If I win, you have to let my sister go." Aether responded. 

The unknown God thought it was interesting and said, "come back tomorrow, and let's have a archery competition."

It's is not an easy task.If you want me to train you, you need to work hard.Are you sure you still want me to teach you?

Aether thought to himself, "I am not a talented archer. What if I lose?" Then, a thought came to his mind, "I can ask Amber, the most powerful archer, to help me." 

Aether travelled and flew to find Amber. He explained the situation and begged Amber to teach him how to shoot with bow and arrow. 

Amber emphasized, "It is not an easy task. If you want me to train you, you need to work hard. Are you sure you still want me to teach you?" 

YES. I need to save my sister.

Aether nodded his head and said firmly, "YES. I need to save my sister." 

Amber agreed to train him. Since Aether did not have enough time, he did not rest. He kept practising until the sun went down and came out again. 

After that, Aether went to find the unknown God again with the bow and arrow Amber gave him.