The story centers on a woman who is getting on in years, but all her cats think she's a man so they call her Ojiichan. One day a brazen cat named Tsushima appears in Ojiichan's yard.
High school freshman Hotaru Hinase has a vibrant life full of family and friendship, but not much luck in romance. That all changes when she makes a warm gesture to her handsome and heartbroken classmate, Hananoi, leading to him asking her out and her becoming flustered. Witness a girl who grapples with the enigma of love and a boy who is heavy handed with it.
The “Seven Deadly Sins”—a group of evil knights who conspired to overthrow the kingdom of Britannia—were said to have been eradicated by the Holy Knights, although some claim that they still live. Ten years later, the Holy Knights have staged a Coup d'état and assassinated the king, becoming the new, tyrannical rulers of the kingdom. Elizabeth, the king's only daughter, sets out on a journey to find the “Seven Deadly Sins,” and to enlist their help in taking back the kingdom.
Sixteen-year-old Maise Higa spends her summer days working part-time at her family's hotel, with absolutely nothing interesting to do. That is, until she meets Ichirou Suzuki—a mysterious boy who is seemingly haunted by strange supernatural occurrences. Upon interacting with him, Maise unexpectedly enters a different reality, where hotel rooms can transform into the deep ocean and banyan trees can spawn indoors out of nowhere. Intrigued, Maise accompanies Ichirou in his quest to uncover the secrets behind the inexplicable enigmas surrounding him.
52-year-old public servant Kenzaburo Tondabayashi gets into a traffic accident. When he regains consciousness, he finds himself reincarnated into a fantasy world's academy, reborn now as the haughty Grace Auvergne, daughter of a duke.
A shaved-headed boy named "Igaguri," his partner "Dog," and various other creatures appear in each episode. Welcome to the mysterious and pleasant world of "Ikimono-san"!