Sungjong is the maknae of the group "Infinite" he was the last one to enter the group , he wasn't suppose to be in it but because of he's friends Cha Sun Woo and  Jung Jin Young he unexpectedly ran into Woolim's boss who is making an audition that day for the 7th member of Infinite , he mistook Sungjong for an auditionee. The boss thinks that he is a great addition to the group specially he has this femanine aura which is unique , he forced Sungjong to audition and fortunately he has the di