When BTS‘s Jungkook first debuted, he was only 16 years old, and it wasn’t surprising that ARMYs grew up calling him the group’s “Baby.” BTS’s Jungkook after he debuted Yet, over the years, Jungkook has grown and matured into an adult. Whether it’s in his performances, schedules, or just relaxing, Jungkook is in his mid-20s,…