On a rainy morning in Tokyo, Takao Akizuki, an aspiring shoemaker, decides to skip class to sketch designs in a beautiful garden. This is where he meets Yukari Yukino, a beautiful yet mysterious woman, for the very first time. Offering to make her new shoes, Takao continues to meet with Yukari throughout the rainy season, and without even realizing it, the two are able to alleviate the worries hidden in their hearts just by being with each other. However, their personal struggles have not disappeared completely, and as the end of the rainy season approaches, their relationship will be put to the test.

While most young girls make an effort to show off their feminine charms, Futaba Yoshioka deliberately behaves like she wants to repel anyone who might be attracted to her. Ostracized by her female classmates in middle school for being a little too popular with the boys, she desperately strives to avoid a similar situation in high school by being unnecessarily noisy and graceless. Nevertheless, scattered among Futaba's unpleasant memories are the treasured moments with the boy she had a crush on, Kou Tanaka. Unfortunately, that spell abruptly ended on a sour note when he suddenly stopped attending school and never came back. When Futaba finds out that Kou has returned—with a different last name this time—she can already feel the butterflies in her stomach. However, Kou Mabuchi is not the warm boy that she remembers from her days in middle school; he is now taller, more charismatic and withdrawn—making him far less approachable. Futaba believes that if she returns to her former self, Kou will begin to take notice of her again. But is she prepared to sacrifice her bubble of normalcy and risk losing her friends in the process?

In the entertainment world, celebrities often show exaggerated versions of themselves to the public, concealing their true thoughts and struggles beneath elaborate lies. Fans buy into these fabrications, showering their idols with undying love and support, until something breaks the illusion. Sixteen-year-old rising star Ai Hoshino of pop idol group B Komachi has the world captivated; however, when she announces a hiatus due to health concerns, the news causes many to become worried. As a huge fan of Ai, gynecologist Gorou Amemiya cheers her on from his countryside medical practice, wishing he could meet her in person one day. His wish comes true when Ai shows up at his hospital—not sick, but pregnant with twins! While the doctor promises Ai to safely deliver her children, he wonders if this encounter with the idol will forever change the nature of his relationship with her.

Through their tutor Fuutarou Uesugi's diligent guidance, the Nakano quintuplets' academic performance shows signs of improvement, even if their path to graduation is still rocky. However, as they continue to cause various situations that delay any actual tutoring, Fuutarou becomes increasingly involved with their personal lives, further complicating their relationship with each other. On another note, Fuutarou slowly begins to realize the existence of a possible connection between him and the past he believes to have shared with one of the five girls. With everyone's feelings beginning to develop and overlap, will they be able to keep their bond strictly to that of a teacher and his students—or will it mature into something else entirely?