 Jiro Wang was the first discovered among the four, appearing as a small character in "The Pawnshop No.8" and a supporting role in "It Started with a Kiss" as "Ah Jin".Closely tracing his popularity that "It Started with a Kiss" has given him, his company decided to give him the lead role for "KO One" as well as Calvin Chen and Aaron Yan for they were discovered around that same time.