The 88'ers are currently enlisting in the army, but it's recently come to light that the actor has already finished not only his regular military service, but his service in the reserve forces as well.
Park Seo Joon previously revealed he had enlisted early when he was 21 (Korean age) before he debuted. He shared in a 2015 interview, "I was uneasy back then and I had nothing, so I went to the army. Going early is helping me now. I'm constantly in dramas, so staff are happy that I won't have a 2-year hiatus."