"The world average age for the first sexual experience... 17.3". Is that early? Late? Seno Sakura has a serious personality. Hara Tsumugi has never liked a member of the opposite sex before. Minagawa Yuna is experienced and is currently dating a company employee. At the age of 17, the girl's "sexual values" begin to fluctuate.

Yanase has worked as a 3D CG designer all across the world. Now back in Japan, Yanase is training a newbie by the name of Kaneda Yuki. There's only one issue: Kaneda is super unfriendly towards Yanase, leaving Yanase frustrated and disappointed. With a new project where they will have to work side by side, how can these two overcome their different personalities?

Koichi, who is cheerful and popular in the class, and Mitsuru, who is talented and not good at socializing. The two high school students are strongly attracted to each other due to their opposite personalities. However, one morning, Koichi is hit by a truck in front of Mitsuru. Koichi got up on the spot and smiled as usual, and although he was indeed "alive", his classmates gradually began to forget about Koichi's existence.

At the end of the first year of high school, Futaba Yoshioka meets Kou Tanaka who was her first love. In their middle school days, they attended the same school, but he suddenly transferred to another school. Three years later, he appears in front of her again with the different last name of Kou Mabuchi. His personality also seems to have changed from warm to cold. He is like a totally different person from three years ago. Futaba Yoshioka slowly learns what happened to Kou Mabuchi for the past three years and she become to have feelings for him again.

Shirasaki Yuki, a rookie actor, finally lands an audition and is chosen to star in a BL drama alongside current superstar Hayama Asami, who was also his senior at university. Feeling anxious and troubled before his first major role, Shirasaki is approached by Hayama with the proposal to form a “romantic relationship for the sake of character development” until the filming concludes. Their pseudo-romantic involvement off-screen leads to a moving and beautifully crafted love story exploring the intricacies of relationships within the entertainment industry and among actors.

Ren Kamijō is the director of the Tokyo Metropolitan Police Department's Criminal Investigation Liaison Division. His father is a former police officer. An incident in Ren's childhood triggered his thirst for power, and he has his sights set on heading the police force by becoming its Superintendent General someday. Ren believes topping the faction that he belongs to is the shortcut to fulfilling his aspiration. He is driven by ambition and has no qualms carrying out work, no matter how dirty it is. His childhood friend Sawa Mizuki, a senior detective in the First Investigation Division, often opposes his stance and mindset as a detective but is the only one who knows about his past.

Ririko Seko (Kuroki Haru), who works in the accounting department of a major publishing company, Kusunoki Publishing, is not very good at understanding other people's feelings or reading the atmosphere, but she has a strong desire to learn about the world and other people. In the accounting department, she is also known as Cerberus, the watchdog of hell, because of her strict checking skills.

Sometimes in a woman’s life, passions boil over and lead them to do things that – in ordinary circumstances – they would never dream of doing. And sometimes this manifests itself in a desire for intimacy. This omnibus-style drama series focuses on a different woman in each episode, focusing on the series of events that led up to a single instance of “transforming into an animal.”

Nishina Shiho, is a young mother and raises her child while working as a writer at home. Although she enjoys her life and has a perfect husband, she is troubled by her lack of sex with her husband, Kosuke, who has ED. Due to this, Kosuke suggests that they attend a "couple exchange party", where couples change their partners for various reasons.