Either Hong Kong culture or the director knows nothing about psychology and S&M.
Annie, the Psychologist would not stop talking about how "in psychology" this and "in psychology" that, trying too hard to prove that she is a psychologist. Psychologists usually have too many people picking their brain that they do not want to bring work to their personal lives, even if they do analyze and talk about their field, they do not put "in psychology" every time they open their mouths.
S&M culture is all about consent and respect! There were absolutely NO Consent, which makes the characters and audience more fearful and causes more misunderstanding.
Enjoyed and admired how Sunny was fluent in English, not many actors/actresses speak like a native. Liked that the girls are buddies and take care of each other, unlike many series where the only other main female lead are always rivals of love. Strong independent women for the win! Did not watch long enough to detect Cinderella syndrome with this series, so good job :) The interviews at the end was fun to watch as well.