Hyungsik took a picture of himself in uniform. He tweeted, "Hey! Today is the day they show 'Heirs'. Ha ha however, it's also the day I practice for the concert. Yo! Peace! ZE:A have their exclusive concert at six in the evening at the SK handball gymnasium on November 23 good good! Hope a lot of you come! Heh." In the picture, he is winking at the camera and striking a pose with a V-sign over his open eye.