2PM's Jun. K expressed his lingering disappointment toward Park Jin-young.

On the episode of SBS's "uh, but like, seriously!" that aired on the 6th, 2PM visited Suzy's boarding house.

During the broadcast, Jun. K drew attention by revealing that he had been unhappy with how parts were distributed in the past. He surprised everyone by saying, "I didn't have a single solo line in our debut song, '10 out of 10'." Despite being the group's main vocalist, he had no individual parts.

When Boom asked, "Well, you had the 'Yeah!' part, didn't you?", Jun. K was touched, saying, "You actually remembered that." Although Jun. K only provided ad-libs for the debut track, Boom added, "You gave your all to that. You put your heart and soul into it."

Jun. K voiced his frustration, saying, "When we performed on broadcast, there were lyric sheets. Everyone else had lyrics, but for me, it was just 'Yeah!' in parentheses. I was only half-visible on screen, too."

He continued, "Actually, I almost became a member of 2AM. I was practicing for 2AM's debut song before I became the main vocalist of 2PM. When we were recording our debut track, the way they decided the parts was by having us sing them one by one. But I was the last in line. By the time it was my turn, it was already over." He shared how disheartened he felt at the time.

Jun. K lamented, "Jin-young hyung told me to do the 'Yeah!' part, so I did my best, but that ad-lib was really all I had." He added, "It was absurd. I'm only talking about this now. I spent four years as a trainee, and all I got was a 'Yeah!'."