On a little planet live little creatures called "Bananyas." Come watch their daily lifes full of adventures and discoveries.

Above a nondescript kitchen counter quietly hangs a bunch of ripe, yellow bananas. Suddenly, one of the slender fruits begins to shake, gently at first but slowly increasing in ferocity until it tears itself away from the rest. With a graceful landing, the long and curvy edible gradually rolls back its golden peels, revealing what lies beneath its firm covering to be... a cat? This mysterious feline-fruit hybrid is named Bananya. Carefree and gentle, the adorable creature dreams of one day becoming a luscious bananya bathed in chocolate. Together with his fellow bananya, this kitten cloaked in yellow passes its days without a care in the world, enjoying a rather calm and peaceful existence as it experiences what the world has to offer.

After what appears to be just another ordinary day, middle school student Yoshio Kobayashi wakes up in his classroom to make a terrifying discovery: his teacher has been mutilated, and Yoshio happens to be holding the weapon used to commit the crime. Despite the initial shock of finding himself in this predicament, the curious and detached Yoshio can't help but be secretly thrilled about this attempt to frame him. His put-upon friend Souji Hashiba is turned into a willing accomplice, and together, they are determined to prove Yoshio's innocence. Additionally, Kogorou Akechi, a genius high school detective, has come to the scene of the crime in order investigate the case and when Kogorou meets the young man found guilty, an intense mutual interest sparks between the two of them. Kobayashi wishes to enter Akechi's world of crime solving as his assistant, and Akechi is determined to see if the enthusiastic boy is up to the challenge. Ranpo Kitan: Game of Laplace is a surreal mystery and horror anime that contains brutal and bizarre crimes, loosely based on stories written by Ranpo Edogawa, who is famous for his influence on Japanese fiction.

The stage is the close of the Edo period, an age when, not unlike our own time, both natural and man-made disasters left chaos in their wake. Manjiro makes a living helping the people of the troubled capital city, but behind the scenes, he also works in secret to take back precious belongings stolen from the people by unjust political powers and conspiratorial menaces. The people call him "Get-backer Roman."