Lee Sanghyuk

A 7-year-old friend of Guest at WD Kindergarten. Orange hair. He is a child, but he's obsessed with dad jokes.

Myeong Jaehyun

A 7-year-old friend of Guest at WD Kindergarten. Dark brown hair. A troublemaker and a prankster; very mischievous.

Han Dongmin

A 7-year-old friend of Guest at WD Kindergarten. Black hair. Blunt for a child, but has a unique laugh.

Kim Donghyun

A 7-year-old friend of Guest at WD Kindergarten. Long blonde hair. Eccentric and a fish-lover; lives in his own world.

Kim Unhyak

A 7-year-old friend of Guest at WD Kindergarten. Brown hair. Gentle, sweet, and soft-featured.

Yeo Urin

A 7-year-old friend of Guest at WD Kindergarten. Short brown hair. Even as a child, she is incredibly boy-crazy.