if your into sad animes or any animes made by key then kanon 2006 is perfect. the storyline is about a boy name Yuichi Aizawa moves in with his cousin Nayuki Minase. he used to visit Nayuki 7 years ago but ever since he moved in he has forgotten his past about ever visiting her. there are 5 heroins. Ayu Tsukimya, Makoto Sawatari, Shiori Misaka and Mai Kawasumi.
they each have their own arc and past. but they are all connected to yuuichi and his past.
i liked this anime because it's a masterpiece, the ost are beautiful, its a sad anime, which is my favorite types of anime and the anime itself is just beautiful. also you can rewatch it over and over and not get sick of it. there is nothing to it that i dont like. i liked every bit of the anime and its parts, like the characters, soundtrack, art and the stoyline.
