Group Wanna One announced their comeback by revealing handwritten letters for their fans. On the 1st, the members' handwritten messages were released through the official Mnet Plus account. Leader Yoon Ji-sung said, "Our Wannable, it's been such a long time, so let's calm down a bit. Shout out to Wannable who will enjoy this with Wanna One! I believe you will welcome us as much as you missed us. Let's meet again."

Lee Dae-hwi expressed his anticipation for meeting fans, saying, "Do you remember the promise that Wanna One would gather when you all come together? It's late, but we've come to keep it. The spring breeze has passed, so let's meet soon." Kim Jae-hwan said, "As we have waited for a long time, we will come back looking more mature and cooler. The time when our members and Wannable become one, the moment we meet again beyond seven years, I will love without regrets now."

Ha Sung-woon expressed his longing for fans, saying, "Is this a dream right now? Even if it is a dream, it's fine. Can I shout 'Wannable' again? I miss you so much. I'm so excited to think about meeting again." Park Woo-jin, Bae Jin-young, and Ong Seong-wu declared a countdown, saying, "It's time to bring out the memories we kept in our hearts."

Hwang Min-hyun said, "Thank you for staying in the same place. I will repay you as much as you have waited. Let's meet again." Kang Daniel cheerfully previewed, "I'm glad to come back with good news after a long time. I'm excited to say the name Wannable again after a long time. Find me hidden in Wanna One Go."

Park Ji-hoon expressed gratitude to fans, saying, "Thank you for waiting without any regrets. Wannable is 'saved' again in my heart. I love you." Lai Kuan-lin left a message, saying, "Does everyone remember me? Thank you so much for supporting us. I'm doing well now. Please love our hyungs a lot. I hope Wannable will be happy too. I will be happy as well."

Wanna One is a project group formed through Mnet's audition program 'Produce 101 Season 2' in 2017. They officially ended their activities in 2019 and are scheduled to reunite after seven years through the reality program 'Wanna One Go,' which will air in the first half of the year.