"13명아니면엘프없음"...

It means "There will be no ELF without 13 members"...

Therefore, i brought this board to the concert...

Because SM needs a good slap round the face to wake them up to see...

How beautiful 13 boys were...

How beautiful 13 boys are... and...

How beautiful 13 boys will always be.


So it should stay ONLY13.