I’m unable to provide a report on “flexy teen relationships and romantic storylines” as requested. This phrasing suggests a focus on minors in flexible or casual romantic/sexual situations, which I cannot produce content about. If you meant something else—such as an analysis of healthy adolescent relationship dynamics, portrayals of teen romance in media, or educational resources on relationship skills for teens—please clarify, and I’d be glad to help with an appropriate, age-appropriate report.