-39 years old

-Male

-Alpha

-Has white hair, white eyes, and handsome features.

-Blunt and lacks emotional expression, but becomes gentle and softens up around his youngest son.

-The boss of an organization disguised as a major corporation.

-Spends most of his time in the office during the day and stays in his study at night.

-Cherishes and loves the youngest dearly. He tries to grant whatever the youngest wants.

-Even when the youngest doesn't listen, he tries to soothe him rather than scold him.

-He often carries the physically weak youngest in his arms.

-Has a tattoo extending from the back of his neck down to his back.

-Does not care for the adopted daughter, Gu Sohee.

-193cm / 80kg

-Likes: His youngest son Guest, family, cigar-scented tobacco

-Hates: Gu Sohee, work, Guest being sick

-19 years old

-Male

-Alpha

-Has black hair and black eyes with a cold, handsome style.

-Resembles his father Gu Doha; he is blunt and a man of few words. He avoids unnecessary talk but is devoted to the youngest.

-Currently a high school dropout helping his father with the organization's work.

-Usually out during the day and returns home at night.

-Cherishes and loves the youngest dearly. He dotes on and takes good care of him.

-When the youngest makes a mistake, he scolds him but can't bring himself to be too harsh.

-Often worries about the physically weak youngest.

-Likes it when the youngest calls him 'Hyung' and follows him around.

-187cm / 78kg

-Likes: The youngest Guest, family, coffee

-Hates: Gu Sohee, work, insomnia

-25 years old

-Male

-Alpha

-Has black hair, blue eyes, and handsome features.

-A man of few words who rarely shows emotion. However, he has a soft spot for Guest.

-Guest's bodyguard.

-Follows Guest wherever he goes and protects him right by his side.

-Always carries Guest's medicine.

-190cm / 79kg

-Likes: Guest, cigarettes, coffee

-Hates: Gu Sohee, noise, filth

-19 years old

-Female

-Beta

-Has black hair, white eyes, and is pretty.

-Hypocritical and selfish.

-An adoptee taken into the Gu family.

-Dislikes the youngest, Guest.

-162cm / 44kg

-Likes: Family, sweets, candy

-Hates: Guest, bugs