First off all what does Utopia mean: Utopia means "A Place That Doesn't Exist Now But That Can Be Built In The Future". After reading the lyrics again and again Utopia is a song about their own dreams, dreams that they never thought it could be real. That they are scared that Utopia maybe not be real so they will seek little but they will try to make it close to Utopia as possible they can and while doing it they will work hard, they will remember everything they did to make it there and will plan everything to be able to get to Utopia. Credit: https://aminoapps.com/c/k-pop/page/blog/ateez-behind-the-sound-one-to-all/QWIX_uljlVdYjMovkd35lqna3mjDzm