Special episode serving as the conclusion to the anime series.

The people of the kingdom look down on the young Prince Bojji, who can neither hear nor speak. They call him "The Useless Prince" while jeering at his supposed foolishness. However, while Bojji may not be physically strong, he is certainly not weak of heart. When a chance encounter with a shadow creature should have left him traumatized, it instead makes him believe that he has found a friend amidst those who only choose to notice his shortcomings. He starts meeting with Kage, the shadow, regularly, to the point where even the otherwise abrasive creature begins to warm up to him. Kage and Bojji's unlikely friendship lays the budding foundations of the prince's journey, one where he intends to conquer his fears and insecurities. Despite the constant ridicule he faces, Bojji resolves to fulfill his desire of becoming the best king he can be.

One year ago, a UFO containing 150 aliens crash-landed off the shores of Kasai. Because no one could fix their ship, the Japanese Government decided to bestow upon them the designation "DearS" and make them into Japanese citizens, teaching them the language, customs, and culture of Japan. However, in order for them to become more familiar with human society, a home-stay program has been enacted to allow them to mingle with other humans. One misty morning, a truck carrying a capsule that housed one of these aliens ends up dropping it into the riverbank, releasing her from her confinement. She is eventually found by a high school student named Takeya Ikuhara, who saves her from being hit by a truck and takes pity on her, despite being extremely distrustful of their race and wanting nothing to do with them. Upon being named Ren, she imprints upon him as her "Master" and serves as his personal "Slave," leaving him with a "DearS" who wants to remain with him no matter what and bringing his ordinary, alien-free days to an end.

Amanda Waller, the head of A.R.G.U.S., has assembled a group of notorious criminals for a mission: Harley Quinn, Deadshot, Peacemaker, Clayface, and King Shark. These DC Super-Villains are sent into an otherworldly realm that's connected to this world through a gate. It's a world of swords and magic where orcs rampage and dragons rule the skies—an "ISEKAI!" Harley Quinn and the others go berserk after arriving in the ISEKAI but are captured by the Kingdom's soldiers and sent to prison. They only have 72 hours before the bombs implanted in their necks explode. The clock is ticking. After negotiations with Queen Aldora, their liberation is contingent upon the conquest of her enemies, the hostile Imperial army. The Squad members have no choice but to throw themselves head-first into the battle's frontline. If they run, they die. If they lose, they die. With their lives on the line, can Harley Quinn and the Suicide Squad survive in the ISEKAI? Brace yourselves for the pulse-pounding saga of the elite task force known as the "Suicide Squad" as they embark on a jaw-dropping adventure! Let the party begin!