First of all draw a circle.
Now draw these lines it'll help you to locate the area to draw eyes, nose, ear and mouth.
Now start drawing Hasegawa's Face beneath the circle.
Now draw these lines beneath his face for his neck.
Now draw his clothes. He's wearing a shirt. Draw shirts collars beneath the neck as you can see in the picture above.
Now draw his hair. His hair hanging down the side of his eyes. He has medium length hair that grows past his ears. And behind his neck.