The fingertip brushed over the soft, smooth skin, slightly cool to the touch.
Wen Nan instinctively wanted to withdraw his hand, but the other person firmly grasped his wrist, pressing it against that patch of skin.
In the end, Wen Nan gave up resisting, gently rubbing his finger over that tattoo.
The warm, rough fingertip lightly grazed over the toenail-sized character "nine," tracing around the edges of the tattoo, on the slightly reddened skin.
Sun Yi's skin there was sensitive, unable to withstand such stimulation, causing the muscles in her leg to tense and her toes to curl, but she bit her lip and didn't pull away.
She smiled, staring straight at the face in front of her, trying to capture every subtle expression.
Wen Nan looked up, returning her gaze, and asked, "When did you get it?"
Sun Yi softly replied, "When I decided I wanted you to be my boyfriend."