Yoona heard baby cries coming from the living room. She tiptoed out of the washroom and went to have a look in the living room.

She saw her college junior, Krystal wearing a long white dress, standing in the centre of the living room. The young girl did not seem to grow older. Krystal was still petite and pretty. She was almost a duplicate of Yoona. Both of them looked rather alike even though they were not blood related. However, that did not stop them from being best friends. Their relationship was comparable to a pair of real blood-related sister.

However, Krystal had gone missing in her last half year of college. She disappeared into thin air without any trace. Since then, Yoona had not heard from her.

Krystal was carrying a baby. Yoona, being a caring sister to her two younger siblings, grew up to like children a lot.

It had been a long time since Yoona contacted her friends and juniors from college. She intended to chat with Krystal after asking what they were doing in her house in the middle of the night and how did they come in.