Lee Dong-Joon

Min-soo and Jae-hyeok is in a good father-and-son relationship. But one day, Min-soo brings Jae-hyeok's young stepmother, Da-hee. Jae-hyeok leaves home to wander around, ran into Da-hee's friend, Na-yeon, and had a little talk. Na-yeon calls Da-hee... Da-hee goes home with Jae-hyeok, and Min-soo doesn't care much. Jae-hyeok tells Da-hee how he feels. Meanwhile, Min-soo who disapproves Da-hee and Jae-hyeok's relationship, calls Na-yeon to kill some time. And Na-yeon who is worried about Da-hee and Min-soo crafts a new plan...

Da-hee gets married to Min-soo who is older than her. Thanks to him, he also gets a son who is not too old, Jae-hyuk, who she tries to get acquainted with, albeit awkwardly. After staying with Na-yeon, she suddenly has to meet Jae-hyuk, and Na-yeon has a date with Jae-hyuk. Min-soo is surprised to find three people coming back home from a date. It made him angry to see his son with two women. Right away, Min-soo seeks Da-hee and asks about Na-yeon. Na-yeon met Min-soo secretly. However, Da-hee who is aware of Min-soo and Da-hee's relationship, shares this fact to Jae-hyun.

Cha-wook and Min-joo are about to get married. Cha-wook proposes a couple trip to Yong-woo’s wife who is his junior at work. Ji-yeon doesn’t like uncomfortable trips but Yong-woo’s boss forced her. The trip has been decided and Cha-wook plans to stay with Ji-yeon, who he’s been eyeing. Min-joo is forced to join. On the day of the trip, Min-joo finally tells everything to Ji-yeon and Ji-yeon decides to use Cha-wook.

Sang-jin, who was envious of her neighbor after getting a beautiful wife, Ask your wife's friend Gian to take over the son's extracurricular teacher, Sang-jin, who left work early, accidentally sees Gian's shower. A man who wants to have sex with his son's tutor, And a son who wants to have a good time with a young stepmom, Ji-an and Jin-hee, who want money, are disappointed with her husband, and Bin-jin gives her body to a young son.

Min-seok is captivated by Na-ri's beauty when they met by chance on the street. The new house in front is noisy and as he knocks on the door, Na-ri and Yeong-hee appears from within. Min-seok drinks with these two sister neighbors. Min-seok spends the night with Yeong-hee while drinking. Na-ri beings to misunderstand these two people and Min-seok confesses his feelings to Na-ri. However, relationship between Jae-hyeon and Na-ri is not serious. Can Min-seok find love?

Hyeon-woo loves Seo-yeon for a long time and has been confessing his feelings constantly, but Seo-yeon refuses Hyeon-woo every time. Bo-ram and Min-jae always come together and drink together whenever Hyun-woo is dumped. However, Min-jae hides his relationship with Seo-yeon to Hyeon-woo. Min-jar tells Seo-yeon to stop teasing Hyeon-woo but Seo-yeon just enjoys the situation. Bo-ram who used to like her childhood friend Hyeon-woo, holds a special class to boost his confidence. He has become depressed after being dumped by Seo-yeon. Hyeon-woo is thankful for meeting Seo-yeon because of her. Only after some time did each of them know their real feelings.

Bo-ram and Hyeon-woo are friends in the neighborhood that I knew since I was young. The two, who were just like children, became adults and began to love each other. Bo-ram prefers a lighter love rather than a more serious one, and Hyun-woo likes only one woman... Hyeon-woo gets help from Bo-ram in many ways to win his favorite Seo-yeon. And as a friend, Bo-ram starts a special class for Hyeon-woo... In the midst of this, Hyeon-woo realizes that his true love is not Seo-yeon but Bo-ram, and he struggles to choose between friendship and love. This is how people in their 20s start their own unpredictable love story.

Ga-yeon comes to Min-jae's house where he lives alone, and decides to live there. Min-jae is curious about Ga-yeon who he haven't seen in a long time. One day, Geon-soo goes to Min-jae's house to pick up some stuff and meets Ga-yeon. Ga-yeon seduces him. Min-jae finds out about it when he phoned Geon-soo. Da-hae meets Min-jae to become sex partners and frequently contacts each other. Min-jae gets angry at the sight of Geon-soo wearing only underwear at his house. Gayeon comes out to meet her friend Da-hae after a long time. Ga-yeon and Da-hae who were drinking, join after seeing Min-jae and Geon-soo. That night, Min-jae gets drunk and had sex with Ga-yeon and finds out that Da-hae is not in a relationship with Min-jae. The next day, Ga-yeon knows the relationship between Da-hae and Gun-soo, and she brings the four people together...