All you have to do is –
☛ Make a high pony as shown in the picture.
☛ Make sure your hair band is tight enough to hold the weight of all your hair.
☛ Now using a pin or a pen, hold it straight vertically over the hairband and start wrapping your hair around it.
☛ You can even leave it loose and not too tight for the messy look.
☛ Keep wrapping till all your hair have been covered.
☛ Now using pins, pin up your hair in the bun position.