“"I'll be going now," she said.
Shinji made no answer and a surprised look came over his face. He had caught sight of a black streak that ran straight across the front of her red sweater.
Hatsue followed his gaze and saw the dirty smudge, just in the spot where she had been leaning her breast against the concrete parapet. Bending her head, she started slapping her breast with her open hands. Beneath her sweater, which all but seemed to be concealing some firm supports, two gently swelling mounds were set to trembling ever so slightly by the brisk brushing of her hands.
Shinji stared in wonder. Struck by her hands, the breasts seemed more like two small, playful animals. The boy was deeply stirred by the resilient softness of their movement.
The streak of dirt was finally brushed out.”

Source: The Sound of Waves (1956), p. 31, ch. 4.