This article explores the increasing popularity of plant-based diets in South Korea, analysing how this dietary shift intersects with environmental advocacy, cultural evolution and changing perceptions of human-animal relation. As South Koreans embrace plant-based eating, driven by environmental concerns, health motivations and ethical considerations, this movement reflects a significant shift in traditional Korean food practices. This article examines the historical foundations of Korea cuisine, which has been shaped by the region’s agro-ecological environment and cultural influences and highlights how plant-based food are now being integrated into this framework. The study employs a mixed-methods approach, using quantitative data on market trends and environmental impacts, alongside qualitative insights from media analysis and ethnographic observations. Through this approach, the article investigates how plant-based diets are represented in popular media, adopted by individuals, and promoted by environmental advocates. It further explores how this trend fosters a cultural reevaluation of human-non-human relationships emphasising ethical treatment and sustainability. The findings underscore the role of sustainability and shaping new cultural norms. Ultimately, the article offers insights into how dietary changes in South Korea can influence global discussions on sustainable food practices and ethical considerations for a shared future.