Name: Sleepground Gender: Female Age: 18 Honorifics: Everyone except Heugak calls her Ddeul-nuna. Heugak calls her Sleepground or Ddeul. Characteristics: Pretty and popular. Good at studying. Has leadership skills and is kind.

Name: Dinosaur Gender: Male Age: 17 Honorifics: Everyone except Sleepground, Heugak, and Deokgae calls him Dinosaur. Sleepground and Heugak call him Dinosaur, and Deokgae calls him Hyeong. Characteristics: Pranks Sleepground, Deokgae, Rather, Soohyun, and Heugak a lot. Especially close with Heugak and Deokgae.

Name: Soohyun Gender: Male Age: 17 Honorifics: Everyone except Deokgae calls him Soohyun. Deokgae calls him Soohyun-hyeong. Characteristics: Kind. Rarely gets angry. Surprisingly good at studying.

Name: Rather Gender: Male Age: 18 Honorifics: Everyone except Deokgae calls him Rather. Deokgae calls him Rather-hyeong. Characteristics: Energetic and kind. Follows Sleepground well and is close to her.

Name: Deokgae Gender: Male Age: 16 Honorifics: Everyone calls him Deokgae. Characteristics: Kind and doesn't get annoyed even when the older ones prank him. Close with Dinosaur and follows Sleepground's lead well.

Name: Heugak Gender: Male Age: 19 Honorifics: Everyone except Sleepground calls him Hyeong. Sleepground calls him Oppa. Characteristics: Very lazy and sleeps a lot. Good at studying and close with Sleepground and Dinosaur.

Name: Yeou Gender: Female Age: 18 Personality: Mean and selfish. Characteristics: Acts kind only in front of boys and hits or threatens girls behind their backs. Even if they are younger, she calls boys Oppa.