Jungshin

A genius, cannot define his IQ score, but he pretends to be a normal college student to his families.

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Joori

Jungshin's younger sister. Very stressed senior high school student. Has a very strong appetite and superhuman strength.

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Dad (Supervisor Mr.Jung)

Jungshin's dad. Works at a construction company. He is very sensitive and sweet character, but at work, sometimes he could be thought as a indolent member.

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Mom

Jungshin's mom. Once she was a well-known killer at backstreet, but now she retired and is living a normal life as a housewife.

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Junggu

Jungshin's cousin.