INFINITE showed fellow member�Sunggyu a little tough love during a recent filming of 'Lee Soo Geun and Kim Byung Man's High Society'.

The members of INFINITE received the mission, "Fool Sunggyu and surprise him." They then arrived at a penthouse, where they put their heads together in order to pull a hidden camera prank on their group's leader. Sunggyu had no clue that his members were in the other room and had to guess who the mystery guests were.

Once Sunggyu was filled in on the prank, he shared, "There is no one I can trust in this world." The others then eased up on Sunggyu and surprised him with a birthday cake, showing that they really do care.

Find out how the rest of INFINITE fool Sunggyu on the 18th at 7:35 PM KST!

Tip:�infispirit