Su-jin, who works as a karaoke helper at an entertainment district in Seoul and a press office salon, asks Ji-yeon, a college student who lives with her, to work for her for one day when her father suddenly asks her to meet her. Su-jin meets Ji-yeon's boyfriend, Seung-yeong, in liberal arts class at her school, where Ji-yeon took her place, and falls for her.

Seung-ryong owns a small toast shop, who is sick from taking in briquette gas in the past after his parents died. One day, his first love comes back to Korea, and they become close. However, he finds out that his little sister is sick.