Apink is one of the 3 most influential gurl group in kpop, along with 2NE1 and sistar
When 2NE1 debuted they were so impactful that literally EVERY single girl group caved in with a dark/fierce/edgy concepts including "mighty" snsd themselves (run devil run/the boys)
Apink is the only one who stucked to their guns with bubbly/innocent concepts despite the huge ridicule. The irony is they leapfrogged over all the others with their own niche.
Fast-forward to 2016 and now you have Gfriend, Lovelyz, Oh my girl, April, etc. Everyone WORSHIPS the group with innocent concepts these days
