Episode 15 of Drifters shipped with the special version of the manga's sixth volume.

Sequel series to Urawa no Usagi-chan.

Fourth season of Date A Live. The story begins in the world of Eurasia, where a phenomenon known as a “spatial quake” causes the death of about 150 million people. 30 years after this tragedy, we follow our protagonist Shido Itsuka and the world is still suffering from these quakes, albeit they are much smaller. One day, Shido comes across a mysterious girl at ground zero of a spatial quake. From his adoptive sister, he learns the girl is one of the “Spirits.” Beings from different dimensions that cause these quakes. So Shido is tasked to seal these beings’ powers to save the world. But to do so, he must woo and kiss these girls. And thus begins the journey of our protagonist as he continues to increase his harem of superpowered girls who all try to take Shido for themselves.

Apfelland is a small but beautiful country surrounded by Russia, Austria, and Germany. Vel is a boy who lives in the capital, Charlottenburg. He happens to help a girl Frid. She was kidnapped because radium mine was found in her grandfather's abandoned mine. Aiming at the radium mine, various people gather there, for example, an American who wants to make money, a Polish woman disguised like a man who wants to earn money for the revolution, and the ministry of Apfelland who plots to affiliate with Germany. Vel and Frida are involved in their plots, and they know the secret of the mine.