Donghae and Aiden are identical twins . They were almost looked alike but the only things that they don't look alike is thier behavior and thier hair colour.

One Day , Thier father ( The king of vampire world)  asked them to go down to the earth to find a slave for themself since they're already 20 y.o .

When the first time they landed on earth they saw a cute blonde boy walking around with a brown little dog while holding  strawberry ice-cream. Without 

wasting any time both of them rushing towards the boy Donghae hold the boy right hand while his twin brother hold the boy left arm and they both say

in unison " He's mine! " . The blonde boy try to struggle away from the taller guys which is still holding his arms " Ermm.. H-hey l-let me go...'" The

blonde boy whispered but ignored by those two who is busy arguing " Now!! Let him decide he want to be who's slave! " The orange haired man said

The brunnate hair man hiss "Fine.. Now you! 03 or 04?! " both of them look at the poor boy straight in the eyes "...w-what..? i-i don't understand.." 

the orange hair man sigh heavily " Oi..Aiden how about ......" The other one whispered something to his twins and the brunette come closer to the blonde

boy and whispered something suddenly the blonde boy vission become dark and darker.... " We decide this at our palace.."