Hyeon-goo introduces Seung-mo to the local area, probably feeling sorry for Seung-mo, who lives under his wife's nagging. However, Hyeon-goo's purpose is to divert Seung-mo's attention and meet Seung-mo's wife, So-hee. After spending time with different people, So-hee and Hyeon-goo's feelings change.

While looking for a job, Min-hee lands a position as a secretary in a detective's office. However, she doesn't have much work. While Min-hee is consulting her brother's love interest with her detective, a case has been assigned to her. The detective thinks it's just love counseling and gets caught up in a case while investigating why they broke up.

Yeong-joon who loves a mysterious woman named Seo-ra succeeds to change the past by visiting a woman with mysterious powers. However, she is now married to a loan shark named Cheol-jae in the changed past. Cheol-jae lives in captivity under Seo-ra and plans a new love and life, while Yeong-jun agonizes over Seo-ra's happiness. The fate of these men and woman who have changed their pasts, unfolds.

The couple, who are full of love, try their best to keep the relationship going, but it is not easy because of the mother-in-law between them. Even her wife is not enough to stop her mother. Searching for a solution, her husband decides to introduce a man to her mother-in-law...

My husband almost slept with his sister. Soon after, his brother-in-law, who keeps coming to mind leaves after realizing that he does not love his wife. And the older sister's husband, Jeong-wook, visits the sister-in-law in anger, but the sister-in-law also suffers from not accepting this situation. The two who flirted like that commit another affair, and Jeong-wook soon feels guilty.

Ji-hye, Yeong-joon, Soo-yeong, and Mi-na enjoys the bachelor party! The next morning, Ji-hye had her ass ripped apart and Yeong-joon had erectile dysfunction, but none of them remembers what happened. They're on the hunt for clues! Three people checked Joon-tae's items in the kitchen. They found out that Joon-tae visited the party. The questioning of Joon-tae revealed that Ji-hye and he had sex but there are more suspicions. The size of Joon-tae's small dick can never tear Ji-hye's ass apart. Who the hell ripped Ji-hye apart?

Newlywed couple A-yeong and Kwang-soo is at the edge of a cliff. After five months of opening a small restaurant in his brother's cabin, Kwang-soo who struggles to attract customers even worked part-time at a parking lot to pay back the rent to his brother. After hearing about this, Kwang-choon said he will waive the store rent until the business is stable. Kwang-choon's kindness had a different purpose, he had his eyes on his younger brother's young and pretty wife, A-yeong, for a long time now! Kwang-choon persistently takes advantage of A-yeong's suffering and hardships in life, and is demands her to have a physical relationship. While A-yeong walks a dangerous path between her husband and his brother-in-law's bedroom, Hyo-seong who is suspicious of her husband's affair was astonished by the fact that his partner was his younger sister-in-aw, and decided to have her revenge. Will the two women be able to escape the tangled web of their relationship

So-hee was forced to start taking private lessons because of her mother. Rather than studying, she starts flirting with her tutor, Hyeon-goo. So-hee tells about her tutor to her friend, Mi-na. Mi-na shows interest in So-hee's tutor, so she tells her she wants to meet him. In exchange, she agrees to introduce So-hee to her boyfriend, Seung-mo. Then one day, Mi-na gets a good idea and calls So-hee and Hyeon-goo to start a 2-on-1 special class.

Seul-i and Yool-i meet on a trip and treat each other more than their own sisters. Seul-i feels burdened by the fact that Yool-i likes her sexually and introduces the men to Yool-i.