[Diclonius]

Kanon and Air tv are both animated by KyotoAnimation, so the style is similar. In short, Kanon is about a young man (Yuichi), who is returning to a small town after seven years, but he has no memory of it. He will meet several girls, who are linked to his past in several ways. This will become clear as the series progresses. It is quite a complex storyline, but is done very well.