On September 26, BoA shared a photo of Wanna One's signed debut album (Pink and Sky versions) on her Instagram.
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Both versions of the album for BoA included a sweet message from the rookie boy group. Wanna One wrote,
"BoA sunbaenim ♥
Kwon daepyonim! No, now sunbaenim.
We always remember your thoughtful words.
You said you'll buy us delicious food if we run into you at a broadcast station so Wanna One will be waiting. Please sing for a long time and watch out for Wanna One ♥ We miss you ♥"