Park Chul Min was a guest on the September 21 airing of 'Radio Star,' during which he revealed just how deep the depths of Park Bo Gum's warm heart runs. 

He said, "Even on days there's no filming session, [Park Bo Gum] comes to the dressing room to carry out errands for the staff. To put it bluntly, he's the total opposite of Jo Jae Hyun. Jo Jae Hyun even tries to skip out on filming days." 

SEE ALSO: K-netizens say BABYMONSTER's Ahyeon has the potential to become the next Jennie

Park Chul Min added, "When I asked him why he came out on a day when there is no filming, he said he just decided to visit because he was bored. He was just sitting there in the dressing room, but I paid it no mind and just got my makeup done. But as I was getting my makeup done, I saw that someone was behind me, and realized that it was Park Bo Gum helping the makeup artist who was doing my makeup."