One-Punch Man Episode 21: The Ultimate Dilemma

Saitama finishes off Bakuzan after the monster attacks him in the ruined Super Fight arena, and then he introduces himself to Suiryu as a hero and explains why he entered the tournament in the first place. Suiryu, shocked and relieved, asks Saitama not to leave because a far stronger enemy is still out there.

Bakuzan recognizes Saitama as the fighter who defeated him earlier, but he refuses to accept being outclassed and launches into a furious attack. Saitama absorbs the blows with little reaction, which leaves Suiryu horrified, because the wounded martial artist can only watch as Bakuzan unleashes the techniques he had boasted about earlier.

After taking a moment to think about something unrelated—he is trying to remember Bakuzan’s name—Saitama ends the fight with a single punch, destroying Bakuzan instantly. The victory is so effortless that it underlines how little danger Bakuzan actually posed to him.

Elsewhere, the broader monster crisis continues to spread. Speed-o’-Sound Sonic is shown training before being confronted by two powerful ninja warriors, Gale Wind and Hellfire Flame, who try to tempt him with monster cells so he can become stronger.

At the same time, Zombieman notices Marshall Gorilla and moves to follow him, but Armored Gorilla appears and knocks Marshall Gorilla out, causing Zombieman to switch targets and tail Armored Gorilla instead. In another thread, Bang and Bomb discuss Garou, and a monster infiltrates a Hero Association member to deliver a message, signaling that the assault is far from over.