Boom revealed a picture he took with the cast of KBS 'Invinsible Youth', G8. 

On his twitter on January 6th, Boom wrote, "My loving family, I grow to love you guys more as time passes. I don't have many skills but I will continue to try my best at taking care of you guys. We can do it! See you guys at 11 on KBS 2TV!"

In this picture, Boom is surrounded by the 8 idol female members and has a big smile on his face. 

Fans who saw this picture commented "Boom looks so happy" and "He must really be happy around all the idol members!"