The girl cried and received mandatory flexibility training in order to become a professional dancer.

女の子はプロダンサーになるために泣きながら強制柔軟性訓練を受けた。一緒にこの女の子の成長を目撃しましょう.
女孩为了成为职业舞者哭着接受强制柔韧性训练。一起见证这个女孩的成长吧
The girl cried and received mandatory flexibility training in order to become a professional dancer. Let's witness this girl's growth together.
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All the girls in this video voluntarily undergo flexibility training to improve their dance skills, and no one forces them