Did Saitama's serious punch physically touch this character? In the finale of season 1, did Saitama's serious punch physically touch Lord Boros or was it just the after-effect of the punch that hit Boros?
Nope, it was simply the shockwave that hit him.



Boros hits Saitama with his Trump card from far away and Saitama does the same with his own trump card from far. So, it's just the shockwave from Saitama's punch.