Hasukawa Kazuya has absolutely no luck. The woman he loves has just married his older brother, and in order to avoid the lovey dovey couple, Hasukawa decides to enter the dorm of a prestigious high school. However this dorm, named Greenwood , seems to be home to the school's strangest students and thanks to Hasukawa's bad luck he ends up as the roommate and neighbor of the three strangest students of all! It seems Hasukawa's dreams of a quiet life are all but doomed as he gets swept up in the antics of Greenwood 's residents!
Mizuki Ashiya is a teen Japanese girl growing up in the USA. After seeing Japanese track star Izumi Sano on TV one day, she became instantly enamored with his grace and style, and became determined to find him and confess her love. She's able to transfer to his all-boys school by hiding her feminine identity, and finds herself as his roommate in the process. However, while the rest of her classmates simply suspect she's a very girly boy, Sano sees through her façade in time, and together they must try to keep Ashiya's true gender a secret. Now, Ashiya must not only try to confess to the man she loves, but also help him work through his personal issues and keep her secret safe from the school in the process!
Hana-Kimi and Here is Greenwood both have set-ups and eccentric casts of characters. Greenwood's storytelling has a more contemplative touch: The humor is often more subtle and the "romantic" bits are less squealy than those in Hana-Kimi. Both series have well-developed characters and (to my eye at least) solid artwork.