
If you're looking for anime similar to Kat & Mouse, you might like these titles.
Shinnosuke and friends are experiencing a one-week stay as part of the "defense force" of Tenkatouitsu Kasukabe Private Academy (nicknamed "Tenkasu"), an elite boarding school that is administrated by a state-of-the-art AI. But when Kazama is attacked, with his intelligence reduced, and strange bite marks left on his butt, the mood begins to change. The Kasukabe defense force joins forces with the school's dropout student council president Chishio Atsuki to form a group of detectives and shed some light on the mystery.
Tantei Team KZ Jiken Note centers on sixth grader Aya Tachibana who worries about friends, family, grades, and more. One day, she joins the Detective Team KZ with four very unique boys that she met in cram school: Kazuomi Wakatake, Takakazu Kuroki, Kazunori Uesagi, and Kazuhiko Kozuka.
Things look bleak for the school's Wind Instrument Club until childhood friends Haruta and Chika step in to save the day. When they aren't practicing to perfect their own playing, they're working hard to save the club by recruiting new members. After a series of mysteries shock the school, they'll have to add junior detectives to their already impressive resumes.
Butlers: They are guardians that hold a thousand-year history and a certain fate. Jay lived in peace with his little sister Tenna and a fellow Butler named Hayakawa. However, those peaceful days came to a sudden end. Tenna was swallowed up into the void and Jay was sent a hundred years into the future. Jay finds there is now an academy called Koyomi Academy standing in the place where his mansion once stood. Jay took up the name Jinguji Koma and became the student council president of the school as he looks for clues about the past. Jay will eventually find out the truth behind this world.
As first year student Konoha Inoue is about to leave school campus, he sees a girl eat a page from the book she is reading. She introduces herself as second year Touko Amano, the literature girl, and asks him to join the Literature Club so that he doesn't expose her secret. After almost two years of being the sole two members of the club, a strange message arrives: a piece of paper with a peculiar drawing. Further investigation leads them not only to Inoue's past, but to the reason to why he has given up on writing novels for the rest of his life.
Kaihe is a high school student who has been given the task of becoming the chairperson for St Luminous, a private religious school for girls, after his grandfather died. Kaihe, along with a friend, arrives at the school to take care of business. But soon, mysterious disappearances start to happen. Will he unravel the mystery of the school and its past before its too late?
"If I don't have to do it, I won't. If I do have to do it, make it quick," is the basic principle by which energy conservationist Houtarou Oreki lives. But after his sister convinces him to join the Classics Club, Houtarou's life is turned upside down when he meets Chitanda, a perpetually-inquisitive girl who challenges the boy's easygoing existence. Intrigued by the slightest hint of a mystery afoot, Chitanda doesn't hesitate to pester the reluctant yet highly analytical Houtarou into satisfying her curiosity at every turn, no matter how small the problem. Alongside fellow members Satoshi and Ibara, the group tackles cases ranging from a self-locking classroom door, a strangely-popular library book, and even the shadowy history of the very club to which they belong!