A young man finds and returns a lost wallet and cell phone to a beautiful young lady, thus begins the destined relationship between two strangers. Sound typical? Well then, how about making the young lady the young man’s future homeroom teacher, and give them both a twisted sense of right and wrong. And just for kicks, let’s have the young man help himself to a self proclaimed reward from the lost wallet before returning it… but of course, this scenario wouldn’t be complete unless the young lady was very unforgiving when it came to teaching one of her students a lesson on morals.

(Source: Infinity Studios)

**Note: This series is tentatively scheduled to resume late Fall 2010.

In the future, an energy source called "Life" has become incredibly important. Certain people are able to synchronize with devices called "Sai" which gives them the ability to extract "Life" and have super powers. These people are known as "Sai Takers." Within the "Sai Takers" there is an even smaller group, "Original Takers." "Original Takers" have a contract with a magical device, and they can manipulate "Life" without the use of a "Sai." These powerful people are also immortal, and they only die if they run out of "Life." The world admires "Sai Takers," but "Original Takers" are careful to keep their identities secret.
Nanase Kyouya is an ordinary teenage boy, who moved in with the girls Igarashi Kyouka and Yuma after the death of his parents. Yuma is a "Sai Taker," but Kyouka is an "Original Taker." One day, he goes with them to see a new model under testing of a magical device, based after Kyouka's. After a deadly terrorist attack, Kyouka desperately contracts Kyouya to the new device model to save his life. The device has some side effects, however, one of which is that it transforms Kyouya into a girl! Now Kyouya is secretly an "Original Taker", and he must go to the elite "Sai Taker" school, as a girl, with Yuma. Will he be able to keep enough "Life" to stay alive? Will he be able to navigate his life as a girl? What other side effects of this device lie in wait for him?
(Source: MangaHelpers)

Taehyun Choi lives with his sister Hakyung Choi. You could say they have a normal life. On the one hand Hakyung has a good job and is successful, however Taehyun isn't good at studying.

His life takes a drastic change when he accidentally learns that he and Hakyung aren't siblings. Which is why he decides to confront her, but then she suffers a serious accident and loses her memory.

This is where everything will change, because those feelings of kinship will become much more important.

(Source: MU)

From ADV:
Woo Sang High is under attack! The entire student body is being terrorized by a duo of frightening bullies who have recently been released from a juvenile detention center. Guk Do and his muscle-headed sidekick, Chung Ki, are on a rampage and they have set their sights on Saang Tae, a brawny teenager with the courage of ten men. He alone will battle the fearsome duo, but there’s only room for a few at the top, and only one man can be The Boss.

A prequel to the original series, the story centers on Chiffon Fairchild's first year at West Genetics prior to her becoming Student Council President, and also explains the origin of her title, "The Unmatched Smiling Monster".
(Source: Wikipedia)

Promo comic by Artlim Media for the second season of the Freezing anime. Recap of Freezing season 1.