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...

Ji-hee makes a place with her friends after a long time. In fact, it's a pretty awkward spot without Ji-hee, but Na-young and Min-soo are excited about the gathering of friends. Each of them prepares everything, but on the day of Ji-hee's circumstances, the two of them meet awkwardly. The two drank one after another to solve an awkward moment. Stop making accidents... Min-soo is caught up by Ji-hee, who came as a surprise.

Since young, Yeon-joo have a crush on her neighborhood brother, Jae-kyeong. Min-soo, had that kind of Yeon-joo in his mind. Whenever she's stressed, she would run to Min-soo A friend. A close secret with a childhood friend and the heart of Yeon-ju who loves him. Will Jae-kyeong be able to accept Yeon-joo as a woman who is younger than him? The unknown love story is just beginning.

Manager Jeong falls in love at first sight with the president's wife who came to deliver the goods to the company. Bo-yeong takes her on a phonetic basis to make her her own woman, and after that, Bo-yeong begins to cross the river that she can't escape.

Happy couple Tae-seop and Jeong-hwa, who are about to get married, disappear one day, and Jeong-hwa is psychiatrically diagnosed with the spirit that her boyfriend Tae-seop is a fictional character. Jeong-hwa, who is struggling, falls in love with Jeong-gook, a psychiatrist who takes care of her. Meanwhile, Tae-seop who disappeared was kidnapped after being gaslighted by his ex-girlfriend Soo-ri.

Not with her husband or boyfriend, she imagined having sex with someone else. Introducing the stories about maturity trained through having sex with new people.

Ji-min is married to Hyeon-soo, a married man with a child. However, Woo-yeong wasn't Hyeon-soo's own son either. The age difference is so small that she feels uncomfortable in her relationship with Woo-yeong. On the other hand, Woo-yeong falls into a sense of self-doubt that she feels love from Ji-min and that feeling from her mother, but accidentally finds out that she is an adopted child and confesses her heart to Ji-min.

The old man who lost his wife and lives in the house of his three daughters-in-law is bothered by their mature bodies. The three careless daughters-in-law have sex with their husbands, or shower without locking their doors, making the old man’s sexual desire more and more active.

Ye-ji who’s been living in the same neighborhood as her crush Jin-gyoo, asks Woo-yeong to live a good life with Jin-gyoo. Jin-gyoo and Ye-ji became a couple but in fact, Jin-gyoo’s sex partner went to Seoul so he can meet Ye-ji instead. Ye-ji is angry with Jin-gyoo, and Woo-yeong comforts her.