On the first day, Choi Yoo-jung posted two photos with Pumpkin balloon emoticons through his instagram.
Choi Yoo-jung in the photo is smiling gently with Pumpkin balloon symbolizing Halloween. Choi Yoo-jung's cute look at the camera shoots at the fan.
On the other hand, the group Weki Meki, which Choi Yoo-jung belongs to, recently acted as the mini 4 title song 'COOL'.