Unmarried couples living together is a growing trend worldwide, but in South Korea, it is still considered taboo due to cultural beliefs rooted in Confucianism and legal restrictions. However, attitudes towards cohabitation are slowly changing among younger generations. Factors influencing unmarried couples' decision to live together include financial reasons, convenience, and the desire to spend more time together. Unmarried couples face challenges finding suitable housing options due to cultural and legal restrictions. The trend has had an impact on South Korea's society, including its economy, housing market, and social norms. Challenges faced by unmarried couples include discrimination, legal restrictions, societal pressure and difficulties accessing certain benefits and services only available to married couples. The future of unmarried couples living together in South Korea remains uncertain due to legal restrictions and societal pressure that still pose significant challenges.