Episode 13, One-Punch Man Wiki

quot;Return of the Hero" is the thirteenth episode of the One-Punch Man anime series and the first episode of its second season. Saitama and Genos are returning from the grocery store when they spot King, S Class Hero Rank 7. Tongue Stretcher terrorizes the populace but immediately surrenders when confronting King due to hearing King's Engine. A robot named G4 soon challenges King to a fight, but lets King leave with his excuse of going to the bathroom so they can fight at "full power". However, G4

Review: One-Punch Man vol. 13 — Comic Bastards

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Episode 21, One-Punch Man Wiki

One-Punch Man (season 2) - Wikipedia

Chapter 7, One-Punch Man Wiki

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Episode 13, One-Punch Man Wiki

Chapter 2, One-Punch Man Wiki

Volume 13, One-Punch Man Wiki