"Show them your A-O face!" As an innocent child, Ao Horie would unhesitantly proclaim the origins of her name. Now that she is in high school, she is determined to study hard in order to one day escape the influence of her lascivious father, a famous erotic author. However, when the amiable Takumi Kijima confesses to Horie, her mind runs wild with scandalous thoughts. Moans eager to escape, legs crossing, and a warmth spreading through her body, Horie cannot help but misconstrue Kijima's rather pure motivations. To make things worse, no matter how hard she tries to ward off Kijima, his advances do not stop. Now, if only she could just study! [Written by MAL Rewrite]

On a whim, first-year Ayumu Tanaka quits the Kendo Club to join the illegitimate Shogi Club. Urushi Yaotome, the president of the club and a master of shogi, is thrilled to finally have a playing partner. As Ayumu's upperclassman, Urushi endeavors to be his shogi mentor and student role model. Too often, however, she finds herself blushing with embarrassment! Stone-faced and honest, Ayumu sees no issue with calling Urushi "cute." Although Ayumu likes her, he refrains from confessing and promises himself to first beat her in a game of shogi. Through school life and shogi games, the two students have many hilarious and heart-warming adventures. Ayumu enjoys every second with Urushi, but he is still a long way from beating her in shogi. With the commitment he made to himself, will Ayumu ever get the chance to confess his feelings to Urushi?

At the Battle of Sekigahara in 1600, Toyohisa Shimazu is the rearguard for his retreating troops, and is critically wounded when he suddenly finds himself in a modern, gleaming white hallway. Faced with only a stoic man named Murasaki and hundreds of doors on both sides, Toyohisa is pulled into the nearest door and into a world completely unlike his own. The strange land is populated by all manner of fantastical creatures, as well as warriors from different eras of Toyohisa's world who were thought to be dead. Quickly befriending the infamous warlord Nobunaga Oda and the ancient archer Yoichi Suketaka Nasu, Toyohisa learns of the political unrest tearing through the continent. Furthermore, they have been summoned as "Drifters" to fight against the "Ends," people who are responsible for the creation of the Orte Empire and are trying to annihilate the Drifters. As the Ends grow more powerful, so does the Empire's persecution of elves and other demihumans. It is up to Toyohisa and his group of unconventional heroes to battle in a brand-new world war to help the Empire's subjects, while protecting the land to claim for themselves and challenging the Ends. [Written by MAL Rewrite]

Unaired episode included in the fourth Blu-ray volume. The episode will take place during the same time in episode 16 (episode 5 in second cours) and depict what Eris and Ruijerd were up to outside the main story, as teased by the comment "Goblin Extermination."