When the Japanese government puts civilian organizations in charge of the country's air force, some of these companies decide to put their aspiring idol singers behind the controls of their fighter planes. Among these groups of idol singers is Hummingbird, a five-woman team consisting of the Toreishi sisters: Satsuki, Uzuki, Yayoi, Kanna and Mina. During a taping session, video director Kudou sees some potential in these girls and jumps in to help them reach the top of the charts by directing their debut video.

On their first day of high school shy Ayumi Nonomura and taciturn Tatsuki Iizuka become lost on the immense campus of Kamizono Academy. An irresistible force of nature named Torako Kageyama accompanied by her best friend Suzume Saotome appears in front of them. Led, sometimes pushed, by Torako, the girls and their classmates work through problems of school, home and adolescence.

Yuusuke was just a normal kid going to high school. Then one day, the cute and behaloed Noelle fell, quite literally, into his life, naked as a baby and every bit as innocent. Before he can even fathom what's just happened, Yuusuke is inducted into a rather odd family of otherworldly beings. Papa is a Frankenstein monster with a taste for calisthenics. Mama is a gorgeous lady with a penchant for "round objects" -- really! The eldest sister, Sara, is literally invisible; the brother, Gabriel, is a teenage vampire with an attitude problem; and the youngest sister, Ruka, loves inventing things. There's a disapproving Grandma, who's a witch to the nth degree, and her vulture familiar. All Yuusuke wanted was for the beautiful Natsumi to even notice his attention, but now he has an angel-in-training to follow him wherever he goes. And Noelle, too, has a guide on her path to being an angel, the mysterious Michael.

Sasahara Natsuki is a poor bounty hunter in a world where monsters and humans live together. Most of her cases involve monsters infringing upon the rights of humans, who are protected by law from their generally more powerful neighbors. Being half-human and half cat-beast, Natsuki straddles the two societies and tries to understand and respect both while enforcing the law. She is assisted by a werewolf named Batanen who is afraid to admit he loves her; another werewolf named Tommy; and a Kyubi fox demon named Sakura who has her own plans--which include eating Natsuki to complete her her nine tails and thereby her magical powers.