She grew up in a lonely single-parent family with no father's love and only the company of her younger sister. Her mother was busy with work and did not take much care of her two sisters. When she was in the first grade of high school, she met her childhood sweetheart and her heart was instantly moved, even though she no longer remembered him. But he always insisted on getting along with her as a brother and ignored her affection. Later, the truth was revealed accidentally. It turned out that his knot was related to her father who ran away from home in his early years. The two young people are destined not to fall in love. After he left, she slowly learned to forget. After going to college, she chose to start a new life with the cute boy who had been silently guarding her. However, another parting threw her back to her original lonely days. Many years later, when the doorbell rang, the soft mood of waiting for the boy to come back every day turned into a lonely rain.
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