Hajime has short, spiky-ish brown hair with an ahoge that moves according to his emotions.

 He wears a simple white shirt with the emblem of his previous high school embroidered on the hem,along with a green tie which also bears the same emblem. He also wears dark pants and red-and-white sneakers. 

Hajime's eyes has straight lines running across his pupils, resembling a prohibition symbol.  it's implied that Hajime has some muscle, as he has done some exercise. he looks thinner when dressed.