It's nothing very unusual. I'm pretty sure there are more anime with similar story. It's about guy Takeru meeting a girl, who came from space. However, Hikari isn't that innocent like everyone might think. Hikari's true purpose makes story more unique.
Art is nice, but nothing extraordinary.
I love both opening and ending themes. Also, all voice actors did great job. I have really no complains here.
Most of the characters are stereotypical: normal guy, who has no luck with girls, quite guy, who's very popular but isn't interested in girls, jealous cousin, who's in love with main guy, innocent girl, who's also in
love with main guy....
But they have their own problems and sad pasts. Also, Takeru's ability to transform is what makes him more outstanding than other similar guys.
Still, I didn't like Takeru very much and I think Jeniifer is very annoying (when she's not working).
After episode 1, I wanted to drop this anime, but I changed my mind after Akari was introduced. I enjoyed watching this anime, but sometimes it was boring.
I was a bit disappointed by the end, but if everything ended like in Hikari's illusion, which she showed to Takeru, I would've given 7, but since ending is different, I give 8.
It's a good anime. Romance and supernatural fans probably will like it.