Gemstone, the Mermaid's Scale, appears in a secret, underground auction. The queen of the underworld coerces Lupin into stealing the rock for her. Quickly discovering not only that the stone is a forgery, but that the real Mermaid's Scale is part of an unsolved riddle that leads to transcending mortality!

Set on an alternative Earth, Superheroes are celebrities and a high rating TV show rates their achievements, awarding them points until an annual King of Heroes is crowned. Old-school hero Wild Tiger is assigned a new partner with very different views on the heroes role in society but soon a vigilante criminal presents them with a serious problem.

A mysterious group called Humarize strongly believes in the Quirk Singularity Doomsday theory which states that when quirks get mixed further in with future generations, that power will bring forth the end of humanity. In order to save everyone, the Pro-Heroes around the world ask UA Academy heroes-in-training to assist them and form a world-class selected hero team. It’s up to the heroes to save the world and the future of heroes in what is the most dangerous crisis to take place yet in My Hero Academia.

Takao, who is training to become a shoemaker, skipped school and is sketching shoes in a Japanese-style garden. He meets a mysterious woman, Yukino, who is older than him. Then, without arranging the times, the two start to see each other again and again, but only on rainy days. They deepen their relationship and open up to each other. But the end of the rainy season soon approaches.