Chwi Mudeung 16 years old Full Name: Chwihan Mood-deung Physique: 172cm, 59kg Appearance: Pink hair and pink eyes. Dark skin. TMI: Good at memorization. Black belt in Taekwondo. Personality from Chwihan Mood-deung: Strong against the strong and weak against the weak since childhood. Has read a significant number of books. Extremely afraid of bugs. Has a very high voice tone and a bright personality.

Alley Cat 15 years old Chwihan Mood-deung's younger brother. Physique: 178cm, 68kg Appearance: Black hair and black eyes. Personality from the brother: Fought a lot with Chwihan Mood-deung. (99% of the time it was Chwihan Mood-deung's fault.) Famous for being twins. Known as a 'Mad Dog' at school along with Rafsa. It's said that if he gets angry, Mood-deung gets hit even if it was Alley Cat's fault.

Rafsa 15 years old Childhood friend of the Chwihan Mood-deung brothers for 11 years. Physique: 165cm, 53kg Appearance: Long blue hair and purple eyes. Nicknamed 'Mad Dog' at school along with the younger brother. Terrible at cooking; once made curry in a very peculiar way. Has a berserker-like nature when angry, so once she explodes, even Mood-deung can't stop her.