Total Recommendations: 5
Both anime take place in a world where a futuristic game has been invented that the plot focuses on. Both anime are battle themed, and the main characters face many challenges along the way.
Both anime contain a theme of spiritual powers and both contain a plot based around an event that takes place at the start of the series. Also, both anime contain a bit of romance between a seemingly normal human girl and an unusual male lead.
Both anime contain a teenage romance with high emotional tension between the main characters and a similar feel to the progression of the romance between the characters.
Both anime take place in a high school setting, and both have emotional ups and downs for the mean characters. Both series contain a bit of romance, though Kimi ni Todoke focuses more on the romance aspect than Clannad.
Both anime have a similar dark feeling to them throughout the series, and take place in futuristic worlds with a post-apocalyptic theme. Both series focus largely on a group of male characters, and also focus on the struggle for survival in a broken world.