The girls held their showcase vlive (hosted by Yubin and Hyelim of Wonder Girls fame). The full thing hasn't been officially uploaded, but here's the perf of Dalla Dalla.
Otherwise it was introductions, positions (updated on the first post) and the girls dubbed their style "teen crush", which I suppose makes sense since they're all in their teens.
They also did a JYP dance medley of Wonder Girls' Irony, Miss A's Good Girl Bad Girl and Twice's Like Ooh Ahh.
I really like the choreo as a whole, just one of the simple fun moments here.
Obligatory Ryujin because Ryujin.
B-side of the single, nothing spectacular imo but a fine intro/cheer of sorts.