Clannad is about a senior-year slacker who, by what thought of as a random chance, runs into a shy girl that appears to be younger than him, but is in fact a year older than him because she was held back for being absent a consecutive amount of times last year.
Clannad is a magnificent story that will make you laugh and cry. The art is amazing as expected by Key from their project with Air. The characters are flawless down to every detail. Their stories will move you unlike any anime you've seen. I would give Clannad a prestigious 10/10 and would recommend it to anyone who asks. Clannad is a true masterpiece that is hard to surpass.