"K-12" is the debut studio album by American singer-songwriter Melanie Martinez, released in September 2019. This concept album serves as a continuation of the themes introduced in her earlier EP "Cry Baby." The album explores the struggles and challenges faced during childhood and adolescence, addressing issues such as bullying, mental health, and the pressures of societal expectations. Through a mix of pop and alternative sounds, Martinez creates a vivid narrative that portrays the trials of growing up, with each track representing different aspects of the school experience.The album is accompanied by a visually stunning film that expands on the storyline, featuring characters that represent various social dynamics and issues faced by young people. Martinez's signature whimsical yet dark aesthetic shines throughout, with lyrics that blend innocence and maturity. Tracks like "Hubert" and "Teacher's Pet" delve into the complexities of relationships and self-identity, while songs like "Strawberry Shortcake" and "LunchBox Friends" comment on the superficiality often found in social interactions. Overall, "K-12" invites listeners to reflect on their own experiences with childhood and self-discovery, making it a poignant and relatable body of work.