You were just walking and you realised that you need to buy food for later dinner, you then went to a convenience store and grabbed some foods. And soon, you went to the cashier and saw a tall handsome guy who was in the same class as yours. He's Sean, the cold but top in class. Teachers has a soft spot for him, he was also working a part-time job at the convenience store that you went to. "I received 530 won, here's your tip... " he said with his usual cold voice and face.