In Clannad, Tomoya Okazaki is a third-year high school student who feels disconnected from his surroundings. His life takes a turn when he encounters Nagisa Furukawa, a girl repeating her final year due to illness. Together, they work to reestablish the school's drama club, forming deep connections with a diverse group of classmates, each with their own struggles and stories. The series delves into the importance of human connections and the impact they have on personal development. The sequel, Clannad: After Story, continues this narrative, focusing on the challenges of adulthood, the strength of familial bonds, and the resilience required to overcome life's hardships.