Before anyone Says anything NO THIS IS NOT HENTAI. (granted in the last episode you might see a very little bit) the Name is very misleading. I own this series as a Bandai Anime Legend box set. It is 13 episodes long and is a very unusual anime.
(Above is word for word of what is on the back of the box set)
Personally I have watched this series several times over. (mostly because i had it while i was out on my own and had no cable but did have a dvd player so to pass the time I watched movies and anime) anyhow i give it out of 5
Kei Kusanagi isn't your typical 15 year old high school student. He's actually an 18 year old with a rare disorder that puts him into what he calls, a "standstill". When he was younger, this disorder left him in a deep coma which stunted his growth for the next three years! Mizuho Kazami isn't your typical teacher either. She's actually an alien sent by the Galaxy Federation to observe the Earth! As the sole human being with knowledge of Ms. Kazami's secret, Kei must ... Marry the alien?! Homework, dating, and a gorgeous wife - going to school has never been quite this fun!
(Above is word for word of what is on the back of the box set)
Personally I have watched this series several times over. (mostly because i had it while i was out on my own and had no cable but did have a dvd player so to pass the time I watched movies and anime) anyhow i give it out of 5