Adaptation of Koyomi History short story released on Madogatari Blu-ray.

The story takes place in Lingshan, where a group of hopeless people are gathered on the earth. Most of them are poor, vicious, or extremely evil, abandoned by the society in Lingshan. This is where the fourth generation of Kuiba Mi Lin was born. The Heavens struggled to find Kuiba to no avail. In order to eliminate Kuiba, the Heavens determined to blast Lingshan into the ground. Mi Lin rose from the predicament, and his spirit gradually awakened souls with flesh and blood in Lingshan. Mi Lin led the Lingshan Army to sweep across the world, against the Heavens, and became the overlord of the world. (Source: Tencent, translated)

During an era of rapid industrial growth, humanity is beset by the emergence of a mysterious virus, capable of turning humans into mindless creatures called Kabane. With a desire for nothing but human flesh, these undead beings can only be killed by destroying their hearts—which are encased in a cage of unyielding iron. Faced with such a dire situation, the surviving population has retreated into fortified cities known as Stations. Isolated from the surroundings by massive moats and towering walls, the only contact with the outside world and other Stations is via a drawbridge for armored Hayajiro trains. At Aragane Station, Ikoma works as a steamsmith to maintain the city's active transportation. Despite his role, he is angered by mankind's cowardice and inability to repel the Kabane. Utilizing his free time and knowledge as an engineer, Ikoma has created a new weapon to ward off the horde. An opportunity to test it presents itself when the Kabane invade Aragane Station, yet this encounter will prove to be much more than just a trial run for Ikoma.

Following an accident where Masato Inohara batted a baseball into the school's water main, the boys' dormitory is partially crippled. Until a plumber repairs the damage, the boys have to stay in the girls' dormitory. To determine which rooms they'll be assigned to, they draw tickets from a hat. Unfortunately, due to the limited capacity, some of the boys will have to go without a bed. Once Riki Naoe draws his ticket, he gets one that forces him to stay in one of the less-than-cozy clubrooms. Seeing his hapless predicament, a nervous Kudryavka Kud Noumi musters enough courage to confront her feelings while asking Riki to sleep in her room instead. Despite the rest of the Little Busters incessantly teasing Kud and Riki about their relationship, he stays with her throughout the summer. As they share unforgettable experiences one after another, the two realize that they might want to be more than just friends.