After a thorough search of available literary databases and young adult fiction archives,

The "Teen" or "Young Adult" designation in the metadata usually signals a specific vibe: innocence, freshness, and a lack of cynicism. It sells the fantasy of a "first love" or a blank slate upon which the viewer can project their desires. Della Cate, in this context, is likely not playing a character with a deep backstory, but rather an emotional utility—someone who provides validation, eye contact, and the simulation of undivided attention.

which details her experiences with teen pregnancy and adoption—a common "Teen Read" in the non-fiction category. Teen Reading Lists: Organizations like Penguin Random House Good Housekeeping

The phrase combines:

*Della Cate has always been the girl who fades into the background — until she finds a forgotten USB drive labeled “24-10-19.” On it: a detailed guide to creating the perfect girlfriend, written by her boyfriend’s ex.

For teenagers, navigating relationships can be particularly challenging. It's a time of significant personal growth and exploration. If you're a teen, consider talking to trusted adults, like parents, teachers, or school counselors, about your relationships and feelings.