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.

In the world of Loveless, each person is born with cat ears and a tail, which disappear only if that person engages in a sexual intercourse. Because of this, they have come to symbolize virginity and innocence. Additionally, fighting is only done by "fighting pairs" or couples, where one is known as the Sacrifice and the other as the Fighter. The first receives the damage while the latter attacks. Ritsuka Aoyagi is a 12-year-old boy, who for some unknown reason suffers from amnesia. His brother got killed recently, and as if his life has not been hard enough lately, on his first day at the new school he gets approached by a stranger called Agatsuma Soubi, who claims to have known his late brother. Ritsuka finds out that Agatsuma and his brother used to be a fighting pair, and that Agatsuma has inherited Ritsuga now that his brother is gone. Together, they try to find the truth behind his brother's death and the organization known as the "Seven Moons," which may have been responsible for it. All the while, it seems that Ritsuka and Agatsuma are becoming closer than they intended to be…

Rinne Rokudou has bigger problems than going to school—namely, helping spirits pass over to the next life. Because of this responsibility, he often finds himself short on money and struggles to buy his necessities: food, clothes, and exorcism tools. Sakura Mamiya has been able to see ghosts since she was little. She hoped she would outgrow it, but even after starting high school, nothing has changed. To make matters worse, the first time her ever-absent classmate, Rinne, shows up for school, only Sakura can see him. She assumes, as anyone would, that he is a ghost. However, to Sakura's surprise, Rinne proceeds to attend school like normal the next day. Kyoukai no Rinne chronicles Sakura's journey as she learns of Rinne's true nature and the existence of a hidden supernatural world. [Written by MAL Rewrite]

In a fateful childhood encounter, Mira Kinohata met a stargazing dreamer named Ao Manaka. Though their time together was short, Ao showed Mira the wonders of astronomy, from orbiting planets to distant stars. Before they parted, Mira learned that a star with her name exists, but there are none with Ao's. And so, she forged a promise: one day, she would discover a new asteroid and name it after Ao. Years later, Mira is still fascinated with astronomy. Now in high school at Hoshizaki Academy, she tries to join the Astronomy Club. Unfortunately, she finds out that the club has been merged with the Geology Club to form a single Earth Sciences Club. She joins this new club and finds a pleasant surprise—she reunites with Ao after years of separation. Alongside their new clubmates, Mira and Ao begin their journey together to fulfill their promise. How hard could it possibly be to find an asteroid? [Written by MAL Rewrite]