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I think MOMOLAND isint changing concept because they want to distinguish themselves among the other kpop groups who dance, sing and have perfect visuals, I think they want for people to be able to find them as MOMOLAND not as any other kpop group.
Lately almost every kpop group are doing the impactful, girl-crush, sext concepts, but if MOMOLAND will do that too they not shine like they do now because the concepts are all the same and the fun MOMOLAND we all know will no longer be seen.
The epitome of fun for the 3rd generation of kpop IS MOMOLAND, no one can take it from them, no one made anyone dance, sing, celebrate and have fun like them. No one can make your heart beat like your partying everyday like MOMOLAND and if they change concepts,
Like the other kpop group YOU right now reading this will no longer feel what you feel right now with MOMOLAND, every new song has that nostalgic feeling which you can NEVER feel from other groups.
MOMOLAND is already a stable group, MOMOLAND IS MOMOLAND, I don't think they will change concepts however they will just improve their sound.