The wall clock struck at 6:30 pm in the empty residence of the Cha family. Sun Hee was soaking wet when she arrived home and immediately went to the shower. She didn't check the weather forecast and left her car at home. She loves to commute sometimes for some exercise.

Sun Hee was wearing a bathrobe and drying her hair with a towel when her mother arrived. Her mother married early, so her youthfulness remained, and she maintained her beauty. They looked like siblings in one glance.

"You came early today. I guess you don't have a lot of patients," she said.

"That's right. Thank goodness. Have you eaten?"

"Not...