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.
Lupin & Jigen have their sights set on a treasure called the Little Comet, which is located in the heavily fortified country of East Doroa. During the heist, Jigen is almost killed by a sniper named Yael Okuzaki. His specialty is preparing tombstones for his targets before executing them. It's said that no one can survive after Yael makes their tombstone.