Kitty Song-Covey, the bisexual lead from the spin-off (a development beyond her straight portrayal in the original To All the Boys books), navigates her senior year romance primarily with Min Ho, a heterosexual endgame, while past tensions with Yuri resolve platonically into a 'familial' bond. Subplots include gay couple Q and Jin reaffirming their relationship despite interference from Q's closeted ex Marius; Yuri (lesbian) reuniting with Juliana after personal growth; and other queer characters like Praveena facing repeated marginalization. Diverse cast includes Asian leads, Black actors (e.g., Sule Thelwell as Marius, Regan Aliyah as Juliana), and international students, fitting the KISS setting without clashing source material.

Themes emphasize personal growth, messy teen relationships, adulthood transitions like pregnancy scares, and self-discovery, with sexuality as a subplot element rather than the core driver—the primary emotional arc is Kitty's slow-burn hetero romance with Min Ho, friendships, and family bonds. No overt lectures on systemic oppression, patriarchy, or identity politics; creator Jenny Han frames Kitty's bisexuality as organic story progression, and showrunner Valentina Garza stresses maturity without activist intent. Audience reception mixes positive reviews for drama and chemistry with queer community backlash over bi erasure, cheating stereotypes, hypermasculinity, and mishandling sapphic arcs (e.g., minimizing Yuri/Juliana, disposable Black girlfriend trope), but lacks broad anti-woke 'go woke go broke' complaints. These elements influence character arcs and subplots significantly but do not form the foundational premise, keeping the show entertaining for its target teen audience without prioritizing message over story.