In a world evocative of the 1950s, Meg and Seron serves as a spin-off to Lillia and Treize, weaving together adventure, mystery, romance, and comedy within a high school setting. Seron, a calm and handsome bookworm, quietly pines for Meg, an innocent and clueless transfer student sharing his classroom. Running parallel to the events of Lillia and Treize, Meg and Seron operates as a standalone entry—no familiarity with the main series required for full enjoyment.