A Certain Seductive Summer

Dong-hoon moves to a new house. On the day of moving, he comes to the landlord to pick up the keys he didn't receive. He is happy to be seeing the beautiful Ji-hyeon. Ji-hyeon noticed Dong-hoon's interest. Dong-hoon had a housewarming celebration with his friend Min-soo. Ji-hyeon started to take a hold on the drunk Min-soo and then passed out in no time. The next day, Dong-hoon happily welcomes Ji-hyeon, who came to him without knowing what happened.

Min-gyoo, who made a lot of money with real estate, got married early and has a son who is less than 20 years old. But his son brought his daughter-in-law, saying he was getting married this time.

Hyang-gi hates her mother who only likes men and doesn't take care of herself. She brings a man to her house to sleep over so her mom will find her crooked. To correct Hyang-gi, she asked Do-hwan, Hyang-gi’s cousin, to live with her at home for a while. Hyang-gi and Do-hwan, who were reunited as adults, grew very attracted to each other. Chae-kyeong, Do-hwan's girlfriend, finds out about it. After revealing the truth in front of everyone, Hyang-gi and Do-hwan are on the verge of breaking up.

Na-ri joined the company as a new employe, capturing the hearts of her colleagues with her outstanding skills and looks, but she had a plan! She pretends to be in love with the president's son, registered her marriage with him, and have other male motives who don't know about it pay for him recklessly. It's a love-war-like story where Hye-seon, who was in an internal relationship with the president, proceeds with the plan that Na-ri has made and eventually takes over the company.

Female employees of the call center work as customer counselors for a company that sells adult products. Under the company's policy of unconditionally satisfying customers, the hardships of employees who always have to endure the customer's power abuse continue. Manager Jang and new employee Yoo-ri, who have long endured and worked under team leader Kang, who wields female employees with his own power, appear in front of Joo-ri. Yoo0ri, who was in charge of Gyejinsang, one of the company's blacklists, as soon as she came. And Joo-ri, who made an unexpected friend with foreign customer Kenny.

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.

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.

Tae-gyoo secretly admires Eun-jae, the beautiful team leader in the same office, but he likes Eun-jae only in his heart because he is already in a relationship with Hye-yeong as a live-in couple. Tae-gyoo who was working with Eun-jae through video chat while working from home, is surprised to see Eun-jae, a computer illiterate, masturbate by calling his name while turning on video chat. The next day, Tae-gyoo secretly peeks at the scene where Eun-jae is dating her husband through a video chat screen, and is angry to learn that her girlfriend Hye-yeong cheated on Eun-jae's husband.

Won-il convinces Ji-na to make money through phone tube. The video of the two went viral, and Won-il picks an additional person. Hwa-jin and Yoo-na who started to work together like that visit Ji-na one day to receive a video and Kwang-soo run towards them...

Yeon-joo and Chan-hyeok loved each other like any other couple at first. However, Chan-hyeok became cold to Yeon-joo, and after fighting, Yeon-joo leaves the house where they lived together. Yeon-joo walked to the place of memories while crying. She recalls her first meeting with Chan-hyeok and tries to forget him by drinking. Chan-hyeok calls Min-ah whom Yeon-joo had met in secret, and Min-ah knows Yeon-joo as Chanhyuk's older sister...

Tae-jin and Hye-jeong sense that there is a problem with their relationship so they decided to have a sex consultation to solve their problem. Sang-soo, who came to the sex consultation, suggests a solution for the couple. At first, they were embarrassed and awkward, but they accepted the sex advice to improve their marital relationship.

Ji-hee, who secretly liked Min-soo, happens to study together at Min-soo's house, who is struggling with the exam. In that situation, Ji-hee secretly imagines a romance with Min-soo. When Min-soo finds out that Ji-hee likes him, he puts his head on and focused on his grades. Meanwhile, stalker Na-yeong, who also secretly likes Min-soo, suddenly visits Min-soo when she sees Ji-hee coming out. Min-soo uses Na-yeong...

The office adjusted working hours due to COVID-19. Representative Jeong-yeon instructs her subordinate, Ho-soo, to install CCTVs to monitor other employees. Na-eun and Yeong-tae work the night shift. He's acting deviant, not knowing there's a CCTV in place...!

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...

Dong-chan, who is working in another region due to his new job, meets Hyeon-joo, who lives next door from his new place. Is it a coincidence or is hos workplace also related to Hyeon-joo in the same building?

Joa, who lived alone with her new father Hail, I'm worried about Dojin, the nephew of Tsunami, who has been living with me for a while now. This is because Do-jin seems to have noticed that the tsunami and his own relationship are related. And for some reason, young Do-jin is increasingly attracted to him. Then one day, Joa didn't know that the tsunami was having an affair with another woman. I ask for sex, but the tsunami sometimes goes unconscious during sex. The tsunami's stamina could not stand. Joo-a waited impatiently in front of the emergency room from Do-jin. Fortunately, I am relieved to hear that there is no harm to life. That night Do-jin asks Joo about his relationship with the tsunami. Joa thinks that the tsunami and her internal relationship is something she can't hide anymore. Tell Dojin all the facts. And Dojin also asked if he was a man who wasn't mixed with a drop of blood. Seduce and engage in sex.​