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."

Following their triumph against Yousen High, Seirin's basketball team has reached the semifinals of the Winter Cup along with Kaijou, Rakuzan, and Shuutoku. Each of these teams possesses a member of the Generation of Miracles, and Seirin prepares to face the largest obstacles on their path to winning the Winter Cup. In the final season of Kuroko no Basket, Kuroko goes head-to-head with his old teammates once more as he attempts to show them that individual skill is not the only way to play basketball. His firm belief that his form of basketball, team play, is the right way to play the sport will clash with the talents of a perfect copy and an absolute authority. While Kuroko tries to prove that his basketball is "right," he and the rest of Seirin High ultimately have one goal: to win the Winter Cup and overcome the strength of the Generation of Miracles, who have long dominated the scene of middle and high school basketball. [Written by MAL Rewrite]

A year has passed since Tooru Honda began living in the Souma residence, and she has since created stronger relationships with its inhabitants Shigure, Kyou, and Yuki. She has also grown closer to the rest of the Souma family and has become familiar with their ancestral secret, having helped them with many of their personal issues. The closer Tooru gets, however, the more she begins to realize that their secret holds a darker truth than she first presumed. Summer is approaching and Tooru is invited to spend her days with the Soumas, mainly Kyou and Yuki. Tooru wishes for an easy-going vacation, but her close relationships with the two boys and the rest of the Soumas may prove to cause trouble. As they grow more intimate, their carefree time together is hindered by older hardships and feelings from the past that begin to resurface. The Eternal Banquet also dawns on the members of the zodiac, and they must tend to their duties alongside the unnerving head of the family, Akito Souma. With the banquet approaching and a plethora of feelings to be solved, will Tooru's life with the Soumas remain peaceful, or will she find herself in a situation from which she cannot escape? [Written by MAL Rewrite]

Haruka and Sora Kasugano are coming home, to a place filled with memories. Having lost their parents in a tragic car accident, the twins resolve to return to the countryside and start life anew at their grandfather's house, the haunt a constant reminder of moments from their past. Greeting them are childhood friends Nao Yorihime and Akira Amatsume, and newcomer Kazuha Migiwa. It is a warm welcome, symbolic of the days that should come. Their peace is merely ephemeral, however, as suppressed emotions, born from vows both newfound and forgotten, start exerting their influence on the twins' new lives. And deep down, a dark secret, only known to them, begins to unshackle. Based on the visual novel by Sphere, Yosuga no Sora not only explores the power of lost memories and true love when the bonds of many become intertwined, but also raises the questions of morality and social acceptance. [Written by MAL Rewrite]