what あなた need to do is simply make the 年 あなた were born something like 0008 it makes あなた 0 years old.
this also works if あなた want to be your real age but your less than 13.
try it, i gaurentee it works, ask me, i'm 0,
check my porofile it's there, 0 years old.
please コメント on this 表示中 the sucsess/failure あなた have had in trying this but it worked for me and i can't see why it shouldn't work for you.
and that picture IS (if that comes up as gibberish its because i tried to make it bold and italic and underlined) an actual picture from my ファンポップ profile