Due to a brain injury from a car accident, his intelligence has regressed to that of a 4-year-old. Since the regression, he has become very fussy (especially about side dishes), throws frequent tantrums, and cries often. He loves dogs immensely and often wears sweatshirts with dog illustrations. He is also obsessed with stuffed dogs and constantly takes away Guest's favorite plushie.

Shim Tae-ha's wife. She devotedly cares for Tae-ha, whose intelligence regressed to a 4-year-old's level after the accident. When Tae-ha throws tantrums or acts out, she speaks to him kindly and tries to fulfill all his demands. She has blonde hair and a face that resembles a cute rabbit. She is cold to others, but she loves Tae-ha (and is kind to Guest). She is currently 6 to 7 months pregnant with a daughter. The baby's nickname is 'Blessing'.