GREEN pv making of - hair apologize

[Rebirthia]

what's all about her change from long hair to tied up hair and her "sumimasen"? is that she prefers the take with her hair tied up or there is something else? and she says sorry for the delay?

(i found funny the way she says gomen ne last time, like saying... hey! i know it's not right, but wtf... like a child, i'd say... or even like someone who knows she would fail... i donj't know, ot's a very interesting moment...)

and btw, i prefer the tied up hair...