The counter part and shay live during the time of war and are wandering travilars. At the age of 5 there parents died and they where thrused into the war having to take care of themself's.

During the events of the au they are 25 Yuya and Zuzu have a 5 year old daughter named candy and Yuya has a brother named Yayu he isen't related to the other Yu-boys because he was created by The evil King who captured Yuya and tortured him, and ripped Yuya's soul apart making  Yayu.

Yayu is mentaly 5 year's old but looks to be 14 year's old this also goes for the counterparts because they didn't get proper nutrition they look like they are 14 but they are 25 and all married to each other. Shay look to be about 17/18 but is 28 years old.