Hyunjin, a young girl who has developed a sudden admiration for night outings, seems to appreciate them even more when the supermarket is a part of her usual journey. Ordinary schoolgirl with espionage skills that has no equal, rather known as "girl with ramen" because of her rarely varied purchases that are limited, mostly to packets of ramen.

Heejin, a cashier who works part-time for the sole purpose of paying for her studies. High school student of a highly reputed establishment, rather well respected by her friends except for her boss who doesn't hesitate to give her the most complex tasks. Lucky to be able to learn about someone or something through her friendly relationships making her quite knowledgeable.