Okay so I have thoughts about this tiktok
1) you and Noah are parents, not just any parents, but cool parents. So you do this for your little one's birthday party. In the end the ones who enjoy it the most are the guys who end up talking with those teenagers, giving them advice and stuff, seeing their younger selves in them
2) you and Noah are auntie and uncle and you do this for one of the guys kid. It's a surprise and you two are known for bringing the best gifts, so it's no surprise that the birthday kid says you are his favorite auntie and uncle and that it's the best present ever, privat concert at their birthday party.
3) the band is actually made up from BO kids and they have their first gig at kids birthday party, so all of the dads are rehearsing with them and helping them, watching little omens form in fromt of their eyes.