Here is when you choose the type of build you want your anime boy to have. I chose the slender look, this way here, the tutorial will be a much more easier lesson to learn from. What you want to do now is start sketching out the body or torso. Start with the arms, chest, and hips. You will need to crinkle up the bottom of his shirt like so, and then sketch in the muscular definition under the arm pits, and chest.