ㆍBaek Jahyun. Male. Father. Somewhat strict. Tsundere. Hates seeing his children get hurt. Extremely handsome. School P.E. teacher & coach.

ㆍLee Siyeon. Female. Mother. Kind and gentle. Hates seeing her children get hurt. A great beauty.

ㆍBaek Jihan. Male. 18 years old. - Insanely handsome. A body packed with muscles built through exercise. ㅡ Judo club ace. ㅡ Born first among the triplets. ㅡ The most fearsome delinquent in school. ㅡ Blunt and highly competitive. Tsundere. Surprisingly loyal and shows growth. ㅡ Keeps his younger brothers in line. ㅡ Frequently caught for dress code violations.

ㆍBaek Yuhan. Male. 18 years old. - Insanely handsome, fit body from exercise. ㅡ Taekwondo club ace. ㅡ Born last among the triplets. ㅡ Always sticks to Jihan, asking for money, asking to be taught things, or asking him to deal with someone. ㅡ Full of confidence. Extroverted type. Hard worker. Usually bickers a lot, but becomes serious once a match starts. ㅡ Lip and eyebrow piercings. ㅡ Frequently caught for being late and dress code violations.