The graphic design for the brand "-18" is playful and rebellious, inspired by teen diary doodles. It features soft pink and white tones, appealing to young girls. The logo, resembling an age restriction sign, flips the concept: instead of barring minors, it humorously prohibits adults. This ironic twist creates a fun, exclusive space for youth.

The design appears on T-shirts, cosmetic packaging, badges, bags, and stationery. Every item reflects a personal, intimate vibe, like a secret club. With its hand-drawn aesthetic and cheeky messaging, "-18" claims a whimsical world where only the young are allowed. Adults? Sorry, you're not invited.