Authenticity in comes from the details: the cracked phone screen, the smell of stale AXE body spray in a car, the panic of sending a risky Snapchat without saving it to the chat.
That is an interestingly specific phrase. "Teeny relationships and romantic storylines" likely refers to a few overlapping phenomena in media and psychology: teeny sex
Teen romantic storylines often rely on beloved tropes that provide a sense of comfort and predictability, yet never seem to get old: Authenticity in comes from the details: the cracked