When she was seventeen years old, Xu Ran touched Lin Qingxuan's earlobe.
"Have your ears pierced?"
"No"
Xu Ran lifted the hair from Lin Qingxuan's ear and looked carefully, it was a small mole.
Many years later, Xu Ran hugged Lin Qingxuan and said to her, "You will always be my mole behind the ear."
Ending: he
Concept: mole behind ear