The name of the EP itself, RBB, represents how the women are seeking to push boundaries and “upgrade” their sound, as Wendy puts it. Listening to the title track, it’s clear that the difference between “Bad Boy” and “Really Bad Boy” is not just a matter of an added adverb, but an added layer of emotional complexity. While “Bad Boy” brazenly admonishes players (“If you play I fight back, I fight back/ I’ll show you who’s in control/ 'Cause I, I know how to make the devil cry”), “Really Bad Boy” explores the more nuanced difficulty of having to leave someone who you love, but who also doesn’t treat you well. “It’s so hard to let go of [a love] completely,” they collectively admit. “[The song is about] that dynamic of the push-and-pull we see in so many relationships, and we think it’s something that anyone can relate to.”