This series tells the story of 9 year-old Katri, a girl who lives on a farm in Finland with her grandparents. Katri's mother has been away in Germany for three years. The farm is not doing well, so to help support her family, she goes to work on a neighboring farm. Katri faces many struggles and challenges.

Sweet and naïve Hanato Kobato came to Earth on a mission to collect and fill a bottle with "konpeito," which appear after healing a person's heart that is suffering. Kobato collects these because it is her wish to go to a certain place. Despite her strangeness, Kobato turns out to be well-suited for this mission as her heartfelt sincerity in helping others earns her the love and admiration of everyone she meets. However, she is not allowed to fall in love with anyone whose heart she heals. [Written by MAL Rewrite]

Silent, apathetic, yet mischievous, 14-year-old Rokujou Miharu is the bearer of the hijutsu, "Shinrabanshou," a powerful technique many ninja clans desire to possess to become the ruler of Nabari. Fellow classmate Kouichi and his English teacher Kumohira are both secretly Banten clan ninjas, pledging themselves to protect Miharu from his many attackers. Keeping apathetic, Miharu attempts to reject their invitation to join their ninja "club." However, after numerous attacks, he finds no choice but to join their group as a means for his survival. Slowly, Miharu takes a step closer to becoming the ruler of Nabari. [Written by MAL Rewrite]

It’s been 7 years since Yuuichi Aizawa visited his aunt Akiko, but now that his parents have gone to Africa to pursue their careers, he is finally back in the little northern town. Yuuichi is not really overjoyed with the prospect of living here though, because all of his memories of this place and the people living in it have mysteriously vanished. His cute cousin Nayuki seems like a stranger as well, even though he used to play with her all the time when they were younger. On the day of moving into his new home, Yuuichi starts unpacking the boxes and stumbles upon a red headband that no one seems to recognize. This is one of the first clues that will make Yuuichi take a stroll through the snow-covered town and make him start recalling fragments of his past, broken promises and buried secrets. Yuuichi soon realizes that there is something supernatural going on, and all of his new female acquaintances seem to have links to his forgotten past.