In a long-forgotten walled town, humans coexist with the Haibane, angelic beings of unknown origin. Rakka becomes the newest Haibane after she awakens from a strange dream and finds herself hatching from a massive cocoon. With no memories of her previous life, Rakka struggles to adjust to her new surroundings, however burning questions remain in the back of her mind.

Japanese-American track-and-field star Mizuki is transferring to a high school in Japan... but not just any high school! To be close to her idol, high jumper Izumi Sano, she's going to an all-guys' high school... and disguising herself as a boy! But as fate would have it, they're more than classmates... they're roommates!

Award-winning fashion photographer Akiha Hara wants Izumi, Nakatsu and Mizuki for his new photo shoot! But the handsome, bisexual Akiha may have a more than professional interest in his models. And has he figured out that Mizuki is a girl? Caught in the treacherous, seductive world of high fashion, can our heroes escape... if they even want to?

Mizuki and her friends go to the country, where they meet and try to help a ghost pining for his lost love. Then, for the big Christmas dance party, Mizuki and Nakao are recruited to help make up for a shortage of females - by dressing up as girls! This turnabout for Mizuki, however, proves to be the least of the complications that flare up when the whole ploy proves too successful!

The Christmas dance party begins, and Mizuki looks for a chance to give Sano a present. Later, Mizuki flies home for New Year's and an unexpected reunion with Gilbert, her first love. Though time has passed and her romantic hopes are now focused on Sano, Mizuki discovers that this old flame hasn't been completely snuffed out in her heart!

Mizuki is broke, so she lands a part-time job with Akiha, the photographer. Among her first-day experiences: spilling tea on male diva supermodel "Alex." This sparks a mutual animosity that is not assuaged when Mizuki discovers the model's most closely guarded secret. Meanwhile, at Mizuki's school, food is disappearing, with the culprits leaving flowers in place of what they've heisted!

Plumbing problems erupt in Dorm 1, forcing the residents to move into Dorms 2 and 3. Mizuki must now deal with two male roommates, one of whom introduces her to a dorm custom she could never have imagined! Dr. Umeda reflects on his past after hearing from an old friend, while Mizuki and Sano find their mutual attraction pulling them ever closer to the brink!

Unable to forget her near-kiss experience, Mizuki finds herself drawing ever closer to Sano, and not in a "roommates" way, either. The tension builds when Nakatsu asks Sano point-blank: Do you like Mizuki? Can Nakatsu and Sano's friendship survive the answer? Meanwhile, Sano's old high-jump rival returns, along with a surprising new challenger!

Sano's little brother Shin returns! Shin has become a rising star of the high jump, and he's determined to prove himself by beating his older brother. But that's not the only blood on the track: the one coaching Shin is their father! Can Mizuki just sit back and watch as Sano fights the father he turned away from... and the brother who never forgave him for doing so?

As the giant track meet approaches, Mizuki and Sano face an assortment of foes: Sano's old high-jump rival Kagurazuka, and Sano's own little brother Shin! But Shin's trainer is the one man Sano hates the most: his own father. Can Mizuki mend the rift in Sano's family? But while Sano focuses on winning, one person is focused only on Mizuki: Nakatsu, the other boy who loves her...

Under his father's disapproving eyes, Sano faces his own brother in a high-jump competition! Then, a schoolwide treasure hunt turns into a grudge match between Kayashima and his self-proclaimed rival, Modoru the onmyoji, a traditional Japanese occultist. Will psychic powers or black magic prevail? But Modoru has something else on his side: the power of cuteness!

This is what it's all been building up to... Shin, Izumi and Kagurazuka compete against one another in the high jump! Then, Sekime gets his own moment in the spotlight when his classmates see him with a strange girl. But if we're talking "strange," she doesn't even compare to the woman who comes onto campus and sweeps an embarrassed Nakatsu off his feet... Nakatsu's mother!