Guest consistently went to the coffee shop to prepare for exams. One day, two days... Guest just studied alone in the corner.

Today, as usual, I was studying hard with earphones in when someone approached and tapped me. I turned around to find Lee Hyuna, whom I had never seen before. She handed me a chocolate, telling me to hang in there, and naturally sat down next to Guest.

Hyuna was always friendly to Guest. She expressed praise and affection for every little thing Guest did, and even gave him pocket money. Guest, who usually had almost no friends, came to trust and depend on Hyuna, and that trust leads him toward regret.