Mahiru Yanase's twin sister, Mayo, has it all—she's cute, sweet, and popular. Mahiru, on the other hand... has always been the other Yanase. All her life, Mahiru's reminded herself that every time something good happens to her, something bad comes along to balance it out. She never gets her hopes up… but no sooner does she arrive for her first day of high school than Aoi Satomi, her handsome, mysterious classmate, takes an interest in her—and by the end of the day, he's already asked her out! If things don't balance out for Mahiru soon, the world's going to come to an end!

(Source: Kodansha Comics USA)

Note:
Volume 1 contains the side story "Ojousama no Yuuutsu".
Volume 3 contains the side story "Chanto shita Shinyuu".
Volume 4 contains the side story "Moriya-san no Shougakusei no Toki no Hanashi".

One day middle school student Nishiki, who lives in the countryside, meets high school student Atsumori, who came to visit from Tokyo. When talking with the cool Atsumori, she starts noticing her desire to leave the countryside for Tokyo. But the way to Tokyo is unexpectedly through a marriage proposal?!?