
The 138th chapter of One-Punch Man, titled Twist, belongs to the Monster Association Arc. Tatsumaki turns her full psychic might on the Psykos and Orochi fusion while Genos buys her time, and the esper begins wringing the enemy and its headquarters into ruin.
High above the ruined city, the clash against the reborn union of Psykos and Orochi grows fiercer. Genos commits to knocking aside the energy fired by Orochi's dragon heads, and when Psykos launches an enormous burst at Tatsumaki, the cyborg throws himself into its path and answers with a beam of his own. As the two attacks grind against each other, he tells Tatsumaki to pull the stranded heroes out of the Monster Association's tower while he keeps the enemy occupied.
Tatsumaki lifts the trapped fighters free of the structure. Genos trades one more exchange with the fusion, cancels an incoming strike, then seizes up, his body no longer able to move. When Psykos shoots to end him, Tatsumaki drops in to guard the crippled hero, turns the blast away, and presses Psykos with questions about Fubuki until dread takes hold of the monster.
Down at street level, Fubuki stands with Bang and Bomb and watches her older sister gather immense power overhead, understanding that she means to close the fight for good. Still marveling at that strength, Psykos is caught in Tatsumaki's grip along with the enemy stronghold itself.
Beneath the surface, blood from the contorted fusion of Psykos and Orochi bleeds upward through the earth. Atomic Samurai hunts for his students but turns up no trace of Iaian, while Child Emperor reaches only the ping of Zombieman's locator with no voice behind it. Pig God then arrives to cover Child Emperor as rubble rains down.
In another underground pocket, Saitama presses Manako over whether her leader caused all the destruction, anxious about his apartment, as the pair keep digging Flashy Flash out from under the debris. King, hauling Tareo along, is driven back down a stairwell when the buildings around them cave in. Overhead, Tatsumaki stays locked on twisting Psykos, her battle drawing toward its end.

Naruto vs Luffy with the twist nobody asked for: Luffy tickled Hinata on date night, and she kind of liked it. We break down the whole fight and commit to a winner....

There are no women on Namek. That isn't an oversight, it's the biology. Why we handed Piccolo the one thing his own species rules out, and why it had to be trap soul....
In Chapter 138, Twist, Genos throws himself between Psykos and Tatsumaki to absorb a massive blast so she can free the heroes trapped in the Monster Association's tower, and Tatsumaki closes in on ending the fight with Psykos and Orochi.
After trading another exchange with the Psykos and Orochi fusion and canceling an incoming strike, Genos seizes up and can no longer move, forcing Tatsumaki to guard him and turn aside a killing blast from Psykos.
Tatsumaki presses Psykos with questions about Fubuki, and the line of questioning fills the monster with dread even as she marvels at Tatsumaki's strength.
Underground, Atomic Samurai searches for his missing student Iaian, Child Emperor can only pick up Zombieman's locator ping with no voice behind it, and Pig God arrives to shield Child Emperor from falling rubble.
Chapter 138 is titled The Wringer in the VIZ Media release and appeared in Volume 28, with a bonus illustration showing a chibi Tatsumaki dressed as a washerwoman wringing out laundry.
Looking for more on Chapter 138: Twist? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
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