Chapter 166

As the Masegaki children line up to flaunt their Quirks, Katsuki and Inasa cheerfully resolve to answer the frenzy with a demonstration of their own. The quiet, clever child doubts either of them will leave a mark. Seiji rises to back Shoto, Katsuki, Inasa, and Camie, warning them against caving to the children's demands, though the Masegaki teacher observes that talk is useless now, because the kids genuinely believe their Quirks are the superior ones.

A Binging Ball tears the mask off Katsuki. Dust floods the space courtesy of another child, and soon powers are firing across the gymnasium. Present Mic marvels at how efficiently the children wield them. Seiji calls it evidence for the theory that Quirks grow stronger and more tangled with each passing generation, a hypothesis Shiketsu High calls the Quirk Singularity.

The students working under Gang Orca notice the chaos and offer to step in, but he refuses, expecting the assigned group to find their fire. Inasa, Katsuki, and Shoto then bring their own Quirks to bear and shut the barrage down. The children are startled that the trainees show no fear of them, and the clever child, unimpressed, tells his classmates to stop holding back. One girl attacks Shoto and freezes mid-motion, entranced, and the Shoto in front of her turns out to be Camie wearing an illusion built from Glamour. The clever child slowly registers that the situation has turned against his class. He cannot forgive adults their mistakes, and the repetition of those errors is what earns his contempt, which is the root of his conviction that his generation will simply use their powers better.

Inasa and Shoto then combine wind and ice into a playground. Shoto raises slides while Inasa's gusts lift the children back to the top, and the spectacle astonishes them. Shoto admits he cannot shape anything so intricate alone and used their Quirks as the framework. The point of it, from all three, was to widen the children's view by engaging them rather than lecturing them.

Katsuki picks up the arrogant child and tells him to go play with his classmates. The boy demands to be released. Katsuki tells him he is the leader of this pack and warns that a person who only ever looks down on others will never spot his own weak points, and the words land. Inasa sets the child on the slide, impressed by the advice. As the playing continues, All Might and Endeavor watch from above, and All Might muses on why humanity has Quirks at all, believing Endeavor already knows the answer to so plain a question.

The Masegaki children unleash their Quirks en masse, tearing Katsuki's mask off and filling the gymnasium with dust and firepower.

Seiji and Present Mic put a name to what they are seeing, the Quirk Singularity, the theory that each passing generation wields stronger and more tangled powers.

Katsuki, Shoto, Inasa, and Camie finally win the children over through sheer command of their own powers, with Shoto and Inasa building an ice playground and Katsuki reaching the group's ringleader.

Number 166 fills 17 pages of the Remedial Course arc and collects into volume 18, reaching Japan on January 15, 2018, in issue 7 of that year.

The cover puts Rei Todoroki alongside her husband and son, Endeavor and Shoto. The anime splits the adaptation, with pages 2 and 3 falling in Episode 79 and the rest covered by Episode 80.

An unusually long roster of Quirks reaches the page. The trainees bring Explosion, Whirlwind, and Half-Cold Half-Hot, with Glamour behind Camie's illusion. The children answer using Binging Ball, Assault Dust, Tongue Tank, Hula Hoop, King Slam, Viral Cosmos, Queen Beam, and Electromagnetic Bullets. The Provisional Hero License Course is logged as continuing. Chapter 165 sits before it, Chapter 167 after.