What's the name of this shoujo/josei anime?!

All I remember is that it's about a girl with dark violet hair who swims and she has a friend that looks exactly like Sakura Kinomoto from Card Captor Sakura!. The Sakura look alike goes out with this guy(who the dark haired girl introduced her to I think) and she gets in an accident that leads her to a coma!. The dark haired friend hooks up with her man while she's still asleep and when she wakes up she doesn't have any memories and everyone pretends that they're still in high school!. Anyone know what the show is called!?Www@Enter-QA@Com

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