Why the rumors about RESCENE Minami losing 20kg don't sound exaggerated

She said she felt it was unfair, but even looking at her Bloom stage from 8 months ago, Minami's frame was noticeably different. Even with Liv, only her face was chubby, but with Minami, her shoulders themselves were...
The fact that she achieved her current physique could honestly be considered one of the great mysteries of teenage idols.
Is it even possible for a body type to change that much? lol