"Kyung-ah" there is a cheerful voice of Dan Oh when she saw the handsome man waiting for her in front of the house.

             It is very unusual for Kyung to come there and pick her up before leaving for school. Since middle school the man more often left and went home from school alone without taking Dan Oh with him. The two of them have been best friends since elementary school, but since entering high school, Kyung has stayed away from her and behaved indifferently towards her. But today she doesn't know what made the man come and take Dan Oh to leave for school together.

              The little girl was...