One day, Tatsumi, a lonely underworld worker, comes across the murder scene of his ex-girlfriend Kyoko. Tatsumi escapes with Kyoko's younger sister, Aoi, who was with her. On the other hand, Aoi, who has lost her beloved family and vows revenge, pursues the murderer of Kyoko. Tatsumi, who is at loggerheads with the impudent Aoi, decides to accompany her on her journey for revenge, and as he cooperates with her, a certain feeling begins to develop.
One day, a beautiful woman named Aki dies mysteriously. Sakura appears in front of popular novel writer Mizorogi and introduces herself as Aki’s twin sister. In fact, Mizorogi stole Aki’s novel "Utsubora." Sakura, who has Aki’s original manuscript of "Utsubora," makes some suggestions to Mizorogi.
2 days until the “Last Graduation Ceremony” of high school, the building was to be demolished. Each student accepted their “farewell to youth” and moved forward with regret and hope in mind. One student visits the library to meet her secret admirer who is also her teacher, one calls her boyfriend with a strained relationship due to the distance of their colleges, one is trying to expose a secret that she hid for the last 3 years, and the last student, Manami, has to give a speech during the graduation ceremony but couldn’t overcome her pain.
Maejima Satsuki works part-time at a garden centre in Tokyo. While her aspiration is to be a voice talent, she is on the verge of giving up. Satsuki has never been serious about what she does. It is the same with romance. However, she meets Morishita Riku, who is a garden designer. After a terrarium that she made captured his attention, Satsuki ends up helping out with a garden project he has undertaken. Before long, the two of them become a couple. Then, the gardener, Shiraishi Yuma, joins the project, and Riku is greatly shaken. Satsuki is unaware of their reunion. The feelings of the three of them intertwine as they focus on completing the garden. Satsuki eventually makes a choice.
When we were 17 we looked at our teacher who was 27 with arrogance but time flies and before we knew it, we were 27 too. We didn't know how hard life could be 10 years later. We didn't know we would meet each other and our teacher again in that future.
Yumi (Mai Kiryu), studying design at university, is dating Naoya (Kisetsu Fujiwara), a member of the theatre society, when one day she learns that she's pregnant. She tells Naoya, who dreams of owning his own theatre company in the future. The more they face reality, the more they seem to be at odds with one another...