In My Hero Academia: World Heroes’ Mission, a mysterious terrorist group called the Humanize are introduced. They strongly believe in the "Quirk Singularity Doomsday Theory." The theory states that as future generations continue to be mixed with the Quirk genes, the power it holds will lead to humanity’s demise. Furthermore, Humanize believes that Quirks are a disease, and so, they plan to “cleanse the world” by exterminating anyone who has one. Humanize planted "Ideo Trigger Bombs" in various countries, and these explosives are said to make a Quirk-user lose control of their Quirk, leading to mass destruction. To save and protect everyone, Pro-Heroes from around the world, and the U.A. Academy heroes-in-training, unite to thwart the efforts of the mysterious group.

"Starlight" - it's a distant star, long ago, and in the far future. Two girls, who were struck by the light of the stage in this play, exchanged their destinies. "Two people's stars, waiting on stage." To burn out ordinary fun and joy and fulfill our destinies. A destiny to become a blast furnace at just 5 years old... what a danger. Eventually the two will meet again. One continued to stand on the stage of tragedy, the other jumped in, separated, jumped in, rewrote their destinies... and created a new chapter full of light. No girl was burned and fell from the tower, nor was she imprisoned. Then... what is the end of that new chapter? "Starlight" is a story of an unknown author. Where does the light come from and where does it go? And who is "starring" in this story? I want to see it. Hey -- Hanako Aishiro, a third-year student at Seisho Music Academy?

The film tells the story of a new transfer student interested in her surroundings, and a song that brings happiness to her and her classmates.

After the defeat of Myouri Unzen at the hands of Medaka Kurokami and her Student Council, peace has returned to Hakoniwa Academy—at least, for a short while. Soon, Medaka, Zenkichi Hitoyoshi, Kouki Akune, and Mogana Kikaijima find themselves wrapped up in another sinister scheme, known as the "Flask Plan," led by the school's principal himself. However, the council's first problem is to deal with a whole new group of superhuman students calling themselves the "Thirteen Party," led by the egotistical but powerful Oudo Miyakonojou. With the mysterious Flask Plan, Oudo's tyranny, and the resurfacing of an old enemy, the state of Hakoniwa Academy is far from tranquil, and Medaka and her companions have their hands full as things only get a lot more abnormal. [Written by MAL Rewrite]