One Punch Man Manga Online Chapter 23

In Chapter 23, titled “Threat from the Sea”, a new crisis begins as the Seafolk — mysterious and powerful aquatic monsters — launch an invasion on City J. They declare humanity weak and claim the land for their own, led by their fearsome ruler, Deep Sea King. The chapter shows various lower-class heroes trying to stop the invasion, but they’re swiftly defeated, revealing how overwhelming the threat is. Mumen Rider gets wind of the situation and heads to help despite being underpowered. Meanwhile, the Hero Association begins mobilizing stronger fighters, and Genos prepares to move out. The chapter sets the stage for one of the series’ most intense arcs, teasing the arrival of a powerful enemy unlike any Saitama has faced so far — one that overwhelms everyone else.