I guess most, if not everyone is guilty of putting a mask (not necessarily a make-up) or putting a facade in front of other people. We want others to see our good side, highlight it and keep within ourselves, our family or friends what we are truly made of. I don't think it's technically lying but just putting your best foot forward.
This JDrama is a manga adaptation so it's a lot of non-sense and I actually enjoyed both the manga and drama. Ha! I admit to being a switch girl myself but i need not just an ON and OFF switch, maybe NORTH, SOUTH, EAST and WEST or even 1 to 10. That's how complicated I am.
Here Nika has an OFF and ON switch, while on OFF mode she's an otaku, cheapstake, messy, silly, etc at home. But while on ON mode, she's cute, stylish and proper.
When Arata (the boy she likes) discovered her 2 personalities, that's where all the fun and craziness starts.