ZE:A made their comeback through Mnet "M! Countdown" on July 5th. On this day, child actress Ahn Seo Hyun who has acted with HyungShik in an SBS drama, visited the group to cheer them on.

HyungShik posted on his Twitter "She came to congratulate us. Dal Byul(Character name) thank you for coming 'Aftershock' best of luck! I'm happy even in the rainy weather", along with photos taken with Ahn Seo Hyun. HeeCheol, MinWoo, and Kevin also posted photos taken with the child actress with the title "ZE:A's 10th Member".

Entertainment company Star Empire associate stated "As it is their comeback after a year, the room was full of tension. However with the entrance of Ahn Seo Hyunm the atmosphere changed completely. The first performance was the song "Body to Body", a song with a bright performance. Thanks to Ahn Seo Hyun, the members were able to loosen up and give a performance with more fun".