I mean, from one of the previous chapter suggest that when Jung ha tries to comb his hair(I think it was the umbrella sharing one?) it immediately went back and here he need a strong spray to get it to stay in that position. So MC must have one stubborn hair.
Also, the reason him also joining the shoot didn't happen in the OG... isn't it because the OGMC caused quite a lot of chaos and damage to them, like what on earth happen, there was a whole lot of explosions in that panel...