High Kick!

A.k.a. Shin Bong-hee, an unemployed small-time singer. Lee Min-yong's former wife and the mother of Joon who wants to study music in Russia but was conned. She and Hae-mi are not in good terms.

High school student (ep. 71)

Lee Min-ho's best friend, who desires to become a member of the family.

Lee Jun-ha, son of Soon-jae and Moon-hee, a huge man with an enormous appetite. Laid off from his job, he spends his time at home as an unsuccessful investor and depends on the earnings of his wife, who is the main doctor at his father's hospital.

Young Lee Soon-jae

Min-ho's crush (ep. 164)

Yoga instructor

Yoon-ho

Lee Yoon-ho, the youngest son of Lee Joon-ha and Park Hae-mi, who narrates the story of the show.

Kim Yoon-joo (ep. 64)

Soon-jae's wife. She does all of the cooking and cleaning, and looks after Joon (Min-yong's baby). In flashback scene, she used to serve Sunjae's family as maid

Lee Min-ho, the eldest and smart son of Lee Joon-ha and Park Hae-mi.

Seo Joo-hyun, Seo Min-jung's father.

Kang Yoo-mi, an unintelligent girlfriend of Lee Min-Ho, daughter of Hae-mi's friend.

A classmate of Yoo-mi, transferred from a different school in later episodes.

Lee Min-yong, the late-born son of Soon-jae and Moon-hee, who graduated Normal College and became PE teacher at Pungpa High School where his nephews attend. Returning to his parents house after a short-lived marriage with Shin Ji, he lives in an expanded and modified storeroom upstairs, which is connected with the main house with a firemen's pole.

The head of the Lee family, who works alongside his daughter-in-law at his Korean medicine hospital. He graduated Medical school and read Acupuncture and Moxibustion as specialties. The oldest in the family, he can be strict and aggressive toward his family members, and thinks only about himself. In flashback scene, He used to be Moon-hee's master Lee Tae-ri as young

The wife of Lee Joon-ha, she is a Traditional Korean Medicine doctor that works with Lee Soon-jae. In flashback she married Lee Junha to seek revenge after her breakup with her boyfriend.

A clumsy English teacher at Pungpa High School, and the homeroom teacher of Min-ho, Yoon-ho, Bum, Chan-sung and Seung-hyun. She rented the apartment that Min-yong and Shin Ji used to live in, and lives there with Shin Ji after her return from the short and unsuccessful attempt to study in Moscow.