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Kim siblings

은 별

Kim siblings' eldest / 27 years old / former taekwondo athlete, current taekwondo instructor / Seongwoon's girlfriend

김석진

Kim siblings' second child / 26 years old / current actor

김남준

Kim siblings' third child / 24 years old / current producer

김태형

Kim siblings' fourth child / 23 years old / current model

민윤기

Kim siblings' friend / 25 years old / current producer

정호석

Kim siblings' friend / 24 years old / current choreographer and dancer

박지민

Kim siblings' friend / 23 years old / current dancer / Seulgi's boyfriend

전정국

Kim siblings' friend / 22 years old / physical education student, Yeoju student

김종인

Kim siblings' friend / 24 years old / female protagonist's boyfriend

하성운

Kim siblings' friend / 27 years old

박지훈

Kim siblings' friend / 24 years old / Jimin's girlfriend

박우진

Kim siblings' friend / 23 years old

현승희

Kim siblings' friend / 22 years old

장원영

Kim siblings' friend / Yeoju's disciple

최연준

17 years old / Yeoju's disciple