i like there story acting and how they directed it

i just don't get how in ep5 FL suddenly become so blind about her bodyguard,
how she discriminated between two of her bodyguards, one is more important then other ?
until ep4 they were so professional about it, but suddenly in ep 5, CEO is enjoying sleeping in bodyguards bed and worried about Manshik out of nowhere ?
and now he got super hearing power too...
after ep 6 ML become worse,
they way they neglected other bodyguard and look down on him
ML become a cry baby and took his anger on Other bodyguard because he do not have guts to do that same to his master
ML then become too arrogant to even talk just because he received BJ from FL in there secret LAB
AFTER ep 5 it started getting downhill,
ML then show fake concern about his partner...?
he don't know if his partner was Worried about him but he know his madam would be worried to death for him ?
at end of ep 6 i see ML wait and wait until killer finishes his job to reach his partner who wasn't given super powers unlike him
that Man died for what ? just salary no BJ and nights talking with CEO, dude got nothing but died... while ML was waiting there standing without doing anything, his super hearing doesn't work at that moment

other bodyguard die and nobody cares, ML even try to make it look like his death help them find a mole so. his death was good for them