the kims,jeon,parks,mins,and jungs...all were best friends since born.....same for thier kids....the 7 of them were unseperable..bestest friends or lover maybe????...except the two brats...the two were always bickering....fav time to bicker was at midnight....making the hyungs give them sound proof room....they knew each other more than any one else....each others fav things, thigs they hate, hobbies, interest....all the things....even how many clothes the other have plus what the other is wearing....most important if u wanna know where the other is ask the other pair... they can only hurt each other....they can only heal each other..... till now no one dared to meddle in between them.....