Soon-jae’s family decides to get their family picture taken to celebrate Joon-ee’s 100th day since birth. But of course things don’t turn out smoothly as they wish! Joon-ee pees on one of them, Soon-jae and Mun-hee fight over the passenger seat, Joon-ee’s parents Min-yong and Shin Ji is occupied quarrelling over their own matter, and Mun-hee and Hae-mi get sensitive over Joon-ha’s hair. Goodness! After all this, the picture is finally taken. However, Soon-jae is not happy about where the picture is hung… and Joon-ha even loses money selling his stock, which adds on to Soon-jae’s grumpy mood. In the meantime, Min-jeong is excited to begin her teaching career as her first day begins at Poong-pa High School. But things turn out to be rough from the beginning because of a pair of weird brothers in her class.

Lee Yoon-ho, who only cares about his looks, tries to look cool this time riding on a borrowed motorcycle. Min-ho wants to tell mom about it, but decides not to since he’ s afraid of Yoon-ho’s high kick. Meanwhile, Min-yong tries to sneak into the house to get a look at Joon-ee, but is busted by Soon-jae and has to run for his life. Mun-hee, feeling bad for Min-yong, tries to bring him some food from home, but her arm gets disjointed in the act. Eventually, the guys end up having to take care of Joon-ee, since Mun-hee can’t move her arm.

Again, Soon-jae dozes off since there are not enough patients to see. This is because most of the patients prefer Hae-mi. And to top it off, Soon-jae makes a huge mistake of misdiagnosing a patient’s condition.

Soon-jae is enraged with his sons and grandsons who always make trouble. Min-yong sneaks into the house and tries living in the attic after letting Shin Ji have the apartment, and Joon-ha makes another loss with his stocks. That’s not all. Min-ho and Beom uses Soon-jae’s credit card to access a 19+ website, and Yoon-ho runs away after bumping into Soon-jae’s car with his motorcycle. Finally, the family members escape to the attic to get away from Soon-jae. Will they be all right? In the meantime, Shin Ji meets a handsome Russian guy practicing ballet in the next classroom while she is studying at her music school in Moscow.

Mun-hee is so annoyed by Hae-mi who always acts like she knows best and tries to lecture her. As Hae-mi makes her look bad even in front of her own friends, Mun- hee whines about it to Soon-jae. But even Soon-jae says it is her fault and makes Mun-hee cry. Min-jeong decides to take firm measures against her students as they don’t take her seriously.

Disturbed by Hae-mi and disrespected by Soon-jae all the time… Mun-hee wouldn't have been able to stand it if it weren't for Mrs. Kaesung-daek. How wonderful it feels to Mun-hee after chatting with Mrs.

Joon-ha always tells Hae-mi not to worry, that he can take care of things. However, in reality, there isn't actually anything he has gotten done right. Mun-hee can’t stand how Joon-ha is driven by Hae-mi, so she decides to act on her own to settle matters regarding Min-yong. Meanwhile, Min-ho pays a visit to Yoo-mi worried that Yoo-mi might fall for Yoon- ho. But when he gets there, Yoo-mi is nowhere to be found, and he comes to face her eerie father instead.

With the information that Bong-won Electronics stocks will fall sharply, Soon-jae looks for Joon-ha to sell their shares, but Joon-ha is sitting on the toilet suffering constipation... As Soon-jae takes the matter in his own hands, he rather ends up buying 500 more shares of the stock. Meanwhile, Min-yong gets Shin Ji’s Russia phone number from Min-jeong. As he ponders whether he should call her or not, he walks into a restaurant and hears a commercial song that reminds him of his memories with Shin Ji.

Hae-mi is always confident and the rest of the family members usually follow what she says. But there is one family member who just can’t seem to agree with her, and that’s Lee Min-yong! Min-yong ignores Hae-mi when she suggests the whole family gather around to make dumplings together… and the heat is on between the two. Min-ho is ecstatic about Yoo-mi’s invitation to her house to watch a DVD. But for some reason, Beom tries to stop Min-ho from going to Yoo-mi’s house.

Mun-hee is surprised when Soon-jae tells her she has an upset stomach after examining her, because she has never had an upset stomach before all her life. Joon-ha is surprised, too, and he becomes worried about the changes in his mom. Meanwhile, Shin Ji is back from Russia and she tries to sneak into the house to get a look at her son Joon-ee.

A fire happens in the girl’s locker room. Fortunately, Min-ho and Beom is able to rescue the girls in there in time, becoming heroes at school. But as time goes by, things don’t go as they expected. The toilet in the bathroom of Soon-jae’s house is clogged. Surprisingly, the person responsible for it is Hae-mi, who always seems so perfect. Mun-hee is unable to control her laughs when she finds out about this and tries to tell all the other family members about it.

Min-ho and Yoon-ho are brothers with nothing in common. Even after watching the same movie, while Yoon-ho can only blurt out incoherent adjectives, Min-ho is able to logically explain the story of the movie. One day, Yoon-ho gets into a fight in the neighborhood with other kids. As punishment, he is grounded and even banned from using his cell phone and computer, so he turns to Min-ho for help. Meanwhile, Min-yong finds out that Shin Ji has come back to Korea. He asks Min- jeong a favor to set him up to seem like he accidentally bumps into Shin Ji.

Mun-hee prepares eel for Min-yong, who seems to be exhausted lately. But oblivious of her intentions, Joon-ha eats up all the eel and Mun-hee gets angry at him. The two end up mad at each other and neither wants to apologize. It’s the rest of the family that has to face the consequences. Soon-jae scolds Min-yong to get the apartment back from Shin Ji. Min-yong, Shin Ji, and Min-jeong each insist upon their own rights and say they should take the matter to court.

Soon-jae, Mun-hee, Joon-ha, and Hae-mi decide to take a trip to Anmyeon-do Island for Soon-jae and Mun-hee’s wedding anniversary. Mun-hee is excited and begins planning things for the trip. However, Hae-mi keeps on changing her mind, Joon-ha follows her opinions, and Soon-jae keeps the new changed plans from Mun-hee, so the trip becomes a disaster from the beginning. Meanwhile, Min-jeong is annoyed by her ex-boyfriend Seong-ho, who keeps on charging his cyber money with Min-jeong’s cell phone number. What’s more, even her students keep pulling pranks on her, making things even worse.

Soon-jae laughs at Mun-hee for learning how to send text messages saying she’s wasting her time. But one day, Soon-jae receives a text message full of weird words from a middle-school kid who came to see him once as a patient. Hae-mi and Joon-ha pays a visit to Yoo-mi’s mom, who’s a friend of Hae-mi, on their way home from a work-out. At the house, Joon-ha accidentally drops a necklace in the hole of the wooden floor. But when Joon-ha tries to get it out, Yoo- mi’s father frantically stops him.

Mun-hee feels bad for Min-yong as she watches him being ordered around by Shin- ji to do small tasks, and tells Soon-jae about it. But when Soon-jae hears this, he takes it as a big deal and is about go to Shin-ji himself, so Mun-hee calms him down saying she’ll talk to her to leave Min-yong alone. Hae-mi and Min-ho have the perfect mother-and-son relationship. But Hae-mi is in shock when she finds out that her little baby boy Min-ho has a girlfriend and has even kissed her.

Hae-mi is such a cool woman that she even promises Joon-ha that she’ll buy him a new car if he loses weight. One day, Soon-jae and Hae-mi get into a small accident on their way to a seminar. Soon-jae gets angry and tries to get the other driver to cover for repair, but Hae-mi doesn't think it’s a big deal and suggests they just let it go. Meanwhile, Min-yong is worried that Shin Ji is having a hard time finding herself a job. Just around then, Min-yong’s school comes in need of a new alma mater song and Min-yong casually recommends Shin Ji.

Soon-jae happens to have a chance to meet with his long-ago crush Kyeong-hwa. He lies to Mun-hee that he’s just meeting some friends and leaves the house all dressed up. But he is busted by Mun-hee on his way taking Kyeong-hwa home. A rumor is spread around the school that Min-jeong is going out with Yoon-ho as she rides Yoon-ho’s motorcycle with him one day to school. To top it off, another rumor begins that Min-jeong is privately tutoring Min-ho as some kids spot Min-ho going into Min-jeong’s house on his way to pick Joon-ee up.

During their morning work-out, Joon-ha and Hae-mi spot Yoo-mi helping her mother Jeong-min walk. As Joon-ha tries to help by carrying Jeong-min on his back, he farts and Jeong-min wonders what Hae-mi saw in Joon-ha to have married such a man. In the meantime, after having too many drinks, Min-yong almost unconsciously directs his taxi to Shin Ji’s apartment and even sleeps in her room. Min-jeong spots this and can’t believe her eyes.

Soon-jae hears that Se-woon Construction is at risk and nags Joon-ha whether they shouldn’t be selling off their share of stock. But Joon-ha firmly denies and tells him to check the analyzed data from his computer. Soon-jae tries looking for the data himself as Joon-ha is sitting in the bathroom, but as he does, he finds something weird on the computer. Meanwhile, after hearing about the lost necklace from Yoo-mi’s house, Yoon-ho suspects a connection with the incident and Mrs. Kaesung-daek’s sudden disappearance.

Soon-jae’s family is in shock after Yoo-mi’s father is arrested as a suspect in Mrs. Kaesung-daek’s murder. They tell Min-ho to be good to Yoo-mi as she might be having a hard time. But Min-ho is actually afraid of Yoo-mi. Dae-guen, a friend of Soon-jae who has a cat-and-dog-like relationship with him comes to visit. Soon-jae becomes eager to get even with Dae-guen as he continues to make Soon-jae look bad in front of his family and nurses at the clinic.

Mun-hee becomes nervous as she hears her sister-in-law Kyeong-ae will be coming to visit from Canada. She’s afraid Kyeong-ae might tell the story she doesn’t want the family members to ever hear. Reluctantly, Mun-hee dresses up to her best in a nice outfit and full make-up, preparing to greet Kyeong-ae. Meanwhile, Min-yong dashes to the airport as he hears that Shin Ji is going back to Russia.

Min-yong is annoyed at how Hae-mi always seems to cut in whenever he speaks. He becomes determined to teach her a lesson and purposely begins to do the same to her. Meanwhile, Mun-hee is startled when she sees someone just like Mrs. Kaesung- daek through her window. She finds out that it is actually her twin sister.

Soon-jae always uses Joon-ha to resolve his own curiosities. When he wants to know if it’s cold outside, he sends Joon-ha out to the veranda to check it out. And this time, as he becomes curious of the taste of instant noodles poured with powdered red pepper, he tries to make Joon-ha to taste it. Meanwhile, Min-jeong thinks everything about Min-yong is so cool and handsome. She thinks his singing voice resembles the voice of Korea’s legendary singer Cho Yong-pil, and even his poor dancing skills appear to her like the moves of top singer Seven. Such delusions only seem to get worse.

Min-ho and Yoon-ho nag Hae-mi for a new computer, but Hae-mi doesn’t listen at all. But as Soon-jae naively pays $10 to the boys to get a song downloaded to his phone, they get an idea to lure Soon-jae for the computer. Mun-hee goes to the market with Shin Ji after getting upset because of Hae-mi. But the two run into Joon-ha and Hae-mi there, and the silent war between Hae-mi and Shin Ji begin from the moment they exchange hellos.