Prior to their comeback, GOT7 dropped a pre-release track "One and Only You" featuring Hyorin. On the March 13 radio broadcast, GOT7 explained how they got to work with the former SISTAR member.
JB said, "She's a close noona of mine. So I shared my musical concerns with her, and she also invited us to 'Fantastic Duo'. The reactions (to our collab on the show) were great, and we were thinking about trying something new with this album. While thinking about what the 7 of us can try, we mentioned working with new people so that's how we ended up collaborating."
A listener asked if they will be able to see their collaboration stage soon. GOT7 answered, "No plans yet but we want to if given the opportunity."
GOT7 also made a promise for music show wins. If they win #1, GOT7 said all the members will do 'apple hair' and wear blush on stage.