One Punch Man Manga Chapter 43

After defeating her subordinates, Saitama easily withstands Fubuki’s psychic attack, Hell Storm, remaining completely unfazed and even mocking her hero status. None of her esper techniques can injure him, which frustrates her further.

In desperation, Fubuki tries to attack with a box cutter but gets caught in the crossfire of the battle between Genos and Speed-o’-Sound Sonic. Saitama steps in and shields her from the blast, revealing his overwhelming durability.

Shocked, Fubuki realizes Genos is actually Saitama’s disciple. Meanwhile, Sonic’s exploding shuriken fails to make any real impact as the chaotic clash continues.