Third-year high school student Jirou Yakuin is in love with his childhood friend and classmate, Shiori Sakurazaka. Thus, he hopes to be paired with her for the "marriage practical": their school's practice of randomly selecting boy-girl pairs to live as pretend married couples while monitoring and rating them on how close they have gotten. Meanwhile, the lively Akari Watanabe wants to be assigned to her crush, the popular and good-looking Minami Tenjin. Much to their dismay, Jirou and Akari find out that not only have they been paired together, but so have Shiori and Minami! Determined to be with their crushes, Jirou and Akari strive to earn as many points as possible, as the top 10 pairs earn the right to switch their partners—so long as both couples agree.

Suletta Mercury leaves her planet and enters the Asticassia School of Technology at the behest of her mother. There, right and wrong are determined through duels between students, and the top-ranking duelist will receive Miorine Rembran as their fiancée—this prize being decided by Miorine's father. When Guel Jeturk, the best pilot in school and Miorine's current fiancé, demands that his betrothed move in with him, Suletta disapproves, so Guel challenges her. Although she emerges as champion, Suletta is subsequently detained on suspicion of piloting a forbidden type of mobile suit—a GUND-ARM, or "Gundam"—which results in her victory being voided. Miorine refuses to accept any more injustices and proposes another duel with even higher stakes. Now, Suletta must triumph a second time, otherwise she will be expelled and the Gundam Aerial that means so much to her will be destroyed.

Kikuko Misuji, more often called "Nikuko-chan," is known by everyone in her small northern town as the happy fat lady at the grill. Having lived arduously traveling from man to man and town to town for the bulk of her life, Nikuko-chan finally seems to have settled down on a houseboat docked in the bay with her daughter—also named Kikuko. Together, the pair does their best to find their place in the world. For the bold and brash Nikuko-chan, her spirited behavior easily guides her toward the earnest goal. However, for the quiet and reserved Kikuko, who is often embarrassed by her mother's antics, each day can be just as uninspiring as the last. From middle school drama to solving the mystery of her strange classmate Ninomiya, Kikuko's adolescence is full of many twists and turns.

A Cinderella story of sorts, Fashion Lala stars a little girl named Miho who doesn't get along with her family. Miho loves to design clothing, but her aunt and three cousins don't believe that such a young girl is capable and mock her designs. Meanwhile, a contest for the new "Disco Queen" is coming up, and Miho wants nothing more than to be able to design a dress for someone to wear to the competition, since she's too young to enter herself. With determination and a little bit of magic, Miho's dreams just might come true!