Chapter 151: Backup

Battered but determined, Fubuki tries to throw herself back into the fight to back up her sister and the others. Bomb stops her, worried for her safety, and observes that she resembles Tatsumaki, a comparison she immediately rejects. On the field, the heroes are handling the Black Sperm copies well, with the Council of Swordmasters and Spring Mustachio bolstering their numbers. When a struggling clone begs Homeless Emperor for help, he refuses, framing the fight as a contest to hunt the S-Class and daring the clone to prove itself. He privately schemes to wipe out Black Sperm once it has multiplied to its limit and menaces humanity through sheer volume.

Genos delivers the gravely hurt Tanktop Master to Fubuki and urges her to heal him before rejoining the battle. Fubuki fears her remaining power is too weak, so she and Bomb combine their strength, her telekinesis channeling their energy into the wounded hero. Tanktop Master recovers a little. Then Garou, now monstrous, bursts up from underground to face them. Bomb loudly warns Bang, who is busy with clones until Atomic Samurai offers to take over, and readies himself for Garou while telling Fubuki to stay clear.

Bomb blocks Fubuki from re-entering the battle and notes her similarity to Tatsumaki. The Council of Swordmasters joins the heroes against Black Sperm's clones. Homeless Emperor declines to aid the clones and plots to destroy Black Sperm after it peaks. Fubuki and Bomb combine powers to partially heal Tanktop Master. Garou emerges in monstrous form, and Bomb prepares to fight him while Atomic Samurai frees Bang.

The chapter appears in Volume 30 and falls within the Monster Association Arc, with Saitama on the cover. A volume bonus page shows Bang and Atomic Samurai eating a quiet meal together, radiating veteran calm and mutual respect. It has no direct webcomic counterpart and was released on May 29, 2021.