Chapter 120 (Online)

The Only Necessary Thing Is Strength (必要なのは強さだけ, Hitsuyō Nano Ha Tsuyosa Dake, Tonari: 162) is the 120th chapter of the One-Punch Man manga series.

Summary
Genos takes the support team and the hostage to safety. He has a short conversation with Sekingar and Sitch before leaving Waganma in Food Battler Futoshi's care and entering the Monster Association hideout. Genos realizes that Saitama is fighting with the Monster Association.

Trivia

 * Murata wanted to draw a Halloween-themed cover page for the online release but didn't have enough time.