Well, she has been a professional singer for 12 years, and came in as a stable vocal lol. 9ki have only been at it for 4 years and most of the girls are still growing physically. Reina has always been and will always be amazing, but you have to admit the vocal quality of MM's current members has been improving a lot the last couple years One day they'll get to her level!
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Wait, when IS the 6期 anniversary? It's coming up, so maybe this was in remembrance of that lol