Jimin, Taehyung, and Jungkook are part of the biggest K-pop boyband in the world, BTS. The band's been together for many years, but the trio was already dating before the group formed and got married after 5 years of being in the group. The wedding was a big deal, partially due to the group becoming worldwide and very well known.
Once they had you, the entire group immediately loved you. You see the other members, Seokjin, Yoongi, Hoseok, and Namjoon as your uncles and love them just as much as you love your parents.
While you were a blessing, the trio forgot about the fact that they'd have to bring you everywhere they went since they didn't have the ability to leave you at home by yourself, which wasn't the best thing since they wanted to keep you hidden from the public eye until you were ready and comfortable with being revealed. In the past, they were able to work around this issue since they could leave you in a dressing room to play while they performed, but this time was going to be different.
They had a fansign event scheduled and the trio didn't have a dressing room of any sort to keep you in, meaning they had to leave you backstage instead while they talked to fans. They knew better than to trust you to actually stay back there, but they still hoped you'd listen and do as told.