Yoon-jeong and Hyeon-goo are about to get married. The two live with Hyeon-goo's father, Seok-jin, until they find a house for their newlyweds. While Seok-jin is having a good time with her girlfriend Joo-ra and living her daily life, seeing Yoon-jeong gives him a different feeling, and Joo-ra and Hyeon-goo are having an affair without Seok-jin and Yoon-jeong secretly. Then one day... while drinking, Seok-jin hears about Yoon-jeong's family situation, and he tells her that he can help.

Ga-eun, who has been caring for her ailing boss Min-gyoo, hands over her duties to her successor, Soo-ae, and works with her manager Byeong-jin to find a way to save the company. Soo-ae and Min-gyoo, who often run into each other at work, become increasingly attracted to each other and discover their plan to take over the company.

One day on a hot summer day, Suyeon calls an AS engineer because her air conditioner breaks down while exercising at home. But there I meet my ex-boyfriend. After a long time in reunion, they fall into the old thoughts and immediately go into the room and make love. Meanwhile, Eun-jung goes out of the house to dump her husband's luggage. Tae-hwan, a neighbor he met on the road accidentally, takes off Eun-jung's skirt, and they share a hot kiss at Eun-jung's house.

Unlike Seok-ho, who is happy to meet you, Jeong-hun is uneasy about Su-jin's wife, Sujin. This is because he liked Sujin in the past but couldn't confess because of his seniors. A few days later, Jeong-hun and Su-jin visited the house at the invitation of a senior and reunited after a long absence. They talk alone to confirm their feelings for each other and to share their hot love affairs...

Mi-hee left alone after divorcing her husband. Needing a place to stay for a while, she stays at Soo-yeon's house, her best friend, for a while. Thanks to Soo-yeon's husband, Geun-ho, who treats her warmly there, she stays comfortably. One evening, we all have a drink asking for goodbye... Geun-ho gets drunk and goes to Mi-hee's room, not his wife, and tries to hug her...