Its not a drama without...

a vocal quirk from the main character

Secret where everyone knows 

a whiny character :|

a small bit of a conversation overheard, which gives the total wrong idea of someone's feelings

shower scene in the first episode displaying the ML's muscular upper  body (but often stopping at his jaw line)

surveillance cameras playing a part (attached to buildings, cars, etc.)

the FL wearing very high heels even if her job often means that she has to run