In the drama, Jun played a cold, young man set on getting revenge, named Lee Soo Gyeom. Although he hasn't received very much professional training in acting, Jun received abundant praise for his first ever acting role.�

He shared, "During my first MV filming, I was bad at facial acting. The hyungs finished quickly but I took a long time, so it hurt my pride. My competitive side got the better of me, and I started practicing my facial expressions in the mirror whenever schedules ended. I was happy when I started getting better. After that, I started to just practice with random scripts, because I thought it would be fun to put in a little more emotion into my facial expressions and try real acting. And then, I got to take part in 'Avengers Social Club'."

Jun continued, "I grew up well-loved, so I'm a very bright person. But Soo Gyeom was a lonely, solitary person who didn't smile a lot. It was a lot of pressure and I wasn't confident. I started filming with the risks that I might get cursed out. But then I saw netizens' comments that said, 'He's from U-KISS?', and it made me incredibly happy. I was elated that they watched me without thinking that I was an idol."�