Cats are quietly living in the attic of the Louvre Museum. For their own safety, the cats live in such a way that humans cannot find them. However, one white cat is so fascinated by the paintings that he shows up at the museum, even ignoring the cat's rules. And he occasionally enters the paintings.
Hikari is a high school student who is good at drawing and dreams of becoming a painter in the future. One day, Picasso is involved in an accident with his only friend Chiaki, who dies. Picasso returns to his daily life without feeling Chiaki's death, but then Chiaki appears in front of him in the form of a fairy. After the accident, Picasso had also acquired the ability to sketch the darkness of people's hearts and enter into their paintings (inside their hearts). Thus, Picasso, together with the dead Chiaki, begins to resolve the darkness in the hearts of his classmates.
Ruka is a junior high school girl who is not good at expressing her feelings. During summer vacation, feeling uncomfortable at home and at school, she meets two boys, Umi and Sora, at the aquarium where her father works. They were raised by dugongs. At the same time, a meteorite fell into the ocean, and the world was experiencing a number of phenomena in which fish with "white spots" disappeared as light. This encounter between the boys and the girl brings about a mysterious change in the sea creatures of the earth.
In the world of "BEASTARS," carnivores and herbivores live together. Legoshi, a grey wolf, is a member of the drama club at Cheriton Academy, a boarding school. One day, an incident occurs: Tem, an alpaca belonging to the same drama club as Legoshi, is brutally murdered and devoured in the night. This incident leads to a difficult relationship between herbivores and carnivores at the Cherryton School. Saddened by Tem's death, Legoshi decides to catch the killer. Meanwhile, he falls in love with Halu, a dwarf rabbit. In a world where interspecies, much less carnivore-herbivore, romance is not common, he is deeply troubled by his love life.
