This drama is adapted from the manga of the same name and tells the story of 33-year-old company employee Narumi Aya (Adachi Rika) wants to touch men and be embraced by men, but if a woman expresses her sexual desire, the world will look at her that way.Worried about the gap between his sexual impulses and his rationality.

Unable to confide in anyone, and struggling in pain, one day, his boss Dojima invited the two of them to go drinking together.Dojima, who is rumored to be a frivolous man who has been divorced once, is not in a relationship for the time being, and has begun to enjoy one-night stands to satisfy each other's sexual desires.“If it's a one-night stand, Aya, who was so determined, made ”my rules“ so as not to regret it, and began to practice ”one-night“ love.Struggling in a closed world, the adult woman's ”sexual survival% begins!

The 33-year-old company employee Narumi Aya (Adachi Rika) is eager to have contact with men and to be embraced.However, she knows very well that if women openly express their sexual desire, they will be looked at differently by society.Narumi Ling is caught in the struggle between impulse and reason.

One day, she plucked up the courage to confide in her boss, Goro Dojima, who was rumored to have become bohemian due to divorce. The other party actually proposed a love relationship model that would not interfere with each other and only exist for a night of fun.

Although she felt that this arrangement was not very beneficial to her, Chenghai Ling still made up her mind to take the first step to change herself.In order to avoid regrets in the future, she formulated five “rules” and embarked on the road to “successful sexual love”...!

In order to dispel the uncontrollable impulse and avoid regrets in the future, Narumi Aya (Adachi Rika) formulated "My One Night Rule" and mustered up the courage to take a step forward and stepped into the bar, hoping to meet a certain man.However, the reality is that there are constant obstacles and bad luck.This scene happened to be seen by her boss Goro Dojima, who then invited her to the sorority party.

But as expected, the sorority was full of women younger than her, which made Aya feel a little out of place.Only Ritsu Maeda, a junior at the same school as Dojima, showed interest in Aya.Despite this, Aya's attention was involuntarily attracted to Dojima, and she was always thinking of him in her heart.In order to calm down the turmoil in her heart, Aya walked to the dressing room, but unexpectedly found herself alone in the room with Dojima...

Narumi Aya (Adachi Rika) was suddenly kissed by her boss Dojima Goro (Hiraoka Yuta). Although she was confused for a moment, she still accepted the long kiss.Back at the social seat, Aya, who was in a trance, was alone with Dojima on the way home. She mustered up the courage to say she wanted to continue kissing, and the two went to the hotel.

Aya, who had sex at the request of instinct, was immersed in the long-lost pleasure and went to work the next day in a good mood, but she was depressed by Dojima who was as if nothing had happened.Wanting to escape the ups and downs of her relationship, Aya starts a matching app to turn her attention to other men, and meets a man...

In order to get rid of her unhappy feelings towards Dojima Goro (Hiraoka Yuta), Narumi Aya (played by Adachi Rika) discusses with Mari Sakazaki (played by Nakata Ainagisa) and musters up the courage to meet a good young man she met on a matching software.However, he was not doing it for love reasons, but for some purpose, plus the constant words hurt him.

On the way home, Dojima's face appeared in Aya's mind, but the person who accidentally called was Ritsu Maeda (played by Kimura Ryo) whom she met at the party.Maeda noticed Aya's change and hurried over, and the two of them went to the izakaya.During the heated discussion about each other's values, Maeda's last words to Aya were...

At the invitation of Ryu Maeda (Lu Kimura), Nakaki Aya (Riha Ada), who came to watch the comedy performance, accidentally met the company's descendant Mari Sakazaki (Azuru Nakada), and was suddenly panicked.However, the conversation between the three gradually became lively, and Aya naturally narrowed the distance with Maeda.Suddenly, she realized that Maeda met the % one-night stand rule she set.However, in the face of Maeda's excessively direct approach, she was a little panicked and could not express her true feelings frankly.

On the other hand, around the same time, Goro Dojima (Yuta Hiraoka) meets again with Lisa Kuroki (Kai Hanaki) who returns from his U.S. headquarters.The next day, Kuroki made a strange proposal to Aya, who works in the company...

Goro Dojima (played by Yuta Hiraoka), who has a crush on a similar relationship, Ryu Maeda (played by Kimura), who meets the conditions for one-night rules, and who meets the same period of 3 years of meetings and has a strong sense of socialization.) The three of them together decided to stay overnight.Ayana Seiha (Riha Adachi) who went on a business trip.

He felt disappointed when he looked at Risa, who had an overwhelming advantage in work, but was saved by Maeda's gentle words.That night, Aya, who was alone with Maeda at the lodge, was invited to take a ride. She drove to the lover's hotel without asking about the destination. The two had a close contact for the first time...

Nariha Aya (Adari Ada), who spent the night with Ryuki Maeda (played by Kimura), was later suggested to continue the "unrestrained adult relationship". She could not understand her true meaning and fell into deep thought alone.On the other hand, Goro Dojima (played by Yuta Hiraoka) accidentally met his ex-wife Ye Mikoto (played by Wakana Sakai). The two walked into the bar where they often went to recall the scene of their divorce.

There, Dojima knew that his love and feelings had unknowingly forced Mikoto into a dead end, and was troubled by the feeling of loss that had nowhere to go.Aya noticed the change in Dojima and invited him to have dinner on the way home from get off work, and listened to him with a kiss. Dojima was moved by the strong Aya...