Humans have created a Wall of Severance to separate themselves from the bears, who grew violent and attacked humans after a far-off planet known as Kumalia exploded many years ago, turning into a meteor shower that fell upon earth. Two bears, Ginko Yurishiro and Lulu Yurigasaki, sneak through the Wall of Severance and disguise themselves as humans, enrolling in Arashigaoka Academy and taking an interest in Kureha Tsubaki, a human girl who despises bears.

The story revolves around high school girls who discover the appeal of motorcycles. Sakura Hane is a high school student who looks a little bit like an airhead. On the way to her all-female high school one day, she is worn-out climbing a hilly road with a bicycle, but she sees a girl named Onsa Amano who is riding a motorcycle. Sakura immediately becomes interested in motorcycles, and she and Onsa join the motorcycle club at the school. Then, Sakura sets out to get her license.

加贺见一也（三瓶由布子 配音）是一名十四岁的中学二年级男生，拥有着容易招致诅咒的特殊体质。母亲去世之前留给了加贺一条腰带，让加贺没有想到的是，腰带中竟然封印着付丧神桐叶（大空直美 配音），在阴差阳错之下，加贺解除了封印，桐叶现身，就这样开始了和加贺住在同一屋檐下的生活。
之后，土地神菊理（久保由利香 配音）也出现在了加贺的身旁。菊理虽然一举一动都想一个大人那样有板有眼，但实际上只是一个有些天然呆的十岁幼女，曾经以儿童乐园为家。加贺收留了无处可去的菊理，整个家里变得更加热闹起来。

After meeting one day, a shy boy who expresses himself through haiku and a bubbly but self-conscious girl share a brief, magical summer.

While visiting Hachijo-jima, Conan sneaks aboard a security boat heading to the Pacific Buoy, an off-shore facility constructed near the coasts built to connect surveillance cameras used by police forces around the world. However, an engineer gets abducted! An eerie sound of a propeller hums underwater as a dark figure begins to creep toward Ai Haibara... When the forbidden Black Box is opened, the sealed-away past will surface above the treacherous waves!

In an alternate history where the male population is nearly decimated, eligible men serve as concubines to the woman shogun inside the walls of the Ooku.