"A Whisker Away" centers on Miyo Sasaki, a spirited middle school student who harbors a deep crush on her classmate, Kento Hinode. Struggling with her home life and feeling disconnected from her peers, Miyo discovers a magical mask that allows her to transform into a white cat named Tarō. In this feline form, she gains the ability to approach Kento, who is otherwise distant and unapproachable in her human form. As Tarō, Miyo spends time with Kento, forming a bond that grows stronger each day.

Kento, unaware that Tarō is Miyo, begins to confide in the cat, sharing his thoughts and feelings. Meanwhile, Miyo’s dual existence as both human and cat becomes increasingly complicated. Her reliance on the mask grows, and she begins to neglect her human life, risking her ability to return to her original form. The story takes a dramatic turn when the mysterious mask seller, who provided Miyo with the mask, reveals a dire consequence: if she uses the mask too often, she may permanently become a cat, losing her human identity forever.

As Miyo grapples with this ultimatum, she is forced to confront her insecurities and the reasons behind her desire to escape her human life. Kento, who begins to suspect a connection between Tarō and Miyo, plays a pivotal role in helping her face her fears. The narrative explores themes of identity, self-acceptance, and the importance of genuine human connection. The climax involves a journey to the mystical Cat Island, a realm where humans and cats coexist, where Miyo must make a critical decision about her future.

The main characters include Miyo Sasaki, whose impulsive and emotional nature drives much of the plot; Kento Hinode, a reserved and thoughtful boy who struggles with his own feelings; and the enigmatic mask seller, who serves as both a guide and a warning to Miyo. The story balances moments of whimsy and fantasy with deeper emotional undertones, creating a tale that is both lighthearted and introspective. The resolution emphasizes the value of embracing one’s true self and the importance of relationships built on honesty and mutual understanding.