
Boruto chapter 40 pits Team 7 and Kawaki against the regenerating Kara member Boro over the sealed body of Naruto. When brute force and jutsu absorption fail against Boro's healing, a hidden poison mist paralyzes the young shinobi and forces a hasty retreat.
Back in the village, Shikamaru fumes that the children rushed off without any sense of how many foes awaited them, and word arrives that a badly hurt, unconscious Sasuke has returned, leaving no one able to follow yet. At the enemy hideout, Boro observes that the site can only be reached through space-time ninjutsu and presses Kawaki on how he arrived. Kawaki brushes the question off and demands to know about Naruto. Amused by the boy's devotion, Boro taunts them by revealing that Naruto lies sealed inside the container he carries, then tosses it over and warns that only Jigen can safely release the seal.
Kawaki confirms Naruto's chakra through his prosthetic hand, but Boro has already slipped away, using the container as a distraction. Mitsuki senses a rising wave of acid from below, and Kawaki absorbs it through his Kama to shield the seal, finding it unharmed. When Boro drenches Kawaki in more acid, Boruto steps in and soaks it up as well, matching the intelligence Delta had gathered on him. Boruto lands a Rasengan, yet Boro simply heals the wound. As Kawaki tries to outpace the regeneration with relentless blows, both boys suddenly collapse, frozen by a dark mist neither of them can absorb.

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Boro greets Boruto as Momoshiki's vessel and thanks him for easing the deadline on Kara's schemes. Mitsuki tries wind and lightning attacks and even binds Boro with snakes, but Boro throws him down and heals from a venomous bite, all while the lingering mist endangers them. Sarada hurls a boulder to buy an opening, and the team grabs Boruto and Kawaki and pulls back. Kawaki bristles at leaving Naruto behind, but Sarada insists they would only have been beaten and must unravel Boro's technique first, reminding him that teamwork is the foundation of a shinobi. The chapter belongs to the Kawaki arc in the eleventh volume.
In Boruto chapter 40, The Invisible Jutsu, Kara member Boro uses an undetectable poison mist that neither Boruto nor Kawaki can sense or absorb, instantly paralyzing them and forcing Team 7 into a hasty retreat. This is the technique referenced in the chapter's title.
Team 7 and Kawaki cannot defeat Boro because he heals from every wound, including a Rasengan from Boruto and a venomous snake bite from Mitsuki's attack, regenerating faster than they can wear him down.
Boro reveals that Naruto lies sealed inside a container he is carrying, tossing it to Kawaki and warning that only Jigen can safely release the seal.
Kawaki uses his Kama to absorb a wave of acid that Boro launches at him, shielding the sealed container holding Naruto and confirming it remains unharmed.
Sarada insists the team retreat after Boro's poison mist paralyzes Boruto and Kawaki, arguing they would only be beaten and must first figure out how to counter Boro's technique, reminding Kawaki that teamwork is the foundation of a shinobi.
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