I.O.I members gathered together in Chungha's new song music video

Inside the music video teaser poster for Chungha's new Christmas special single

The members of I.O.I have gathered together

It's not perfect though ㅠㅠ

But I heard that the I.O.I members meet and keep in touch regularly, so I want to see the whole group someday ㅠㅠ