"Hina is Beautiful" centers around Hina, a high school girl who struggles with self-esteem due to her perceived lack of beauty. Despite her insecurities, Hina possesses a kind heart and a strong sense of empathy, which endears her to those around her. The narrative explores her journey of self-discovery and personal growth as she navigates the challenges of adolescence, friendship, and societal expectations.

The story begins with Hina feeling overshadowed by her more conventionally attractive peers, particularly her best friend, Aya, who is confident and popular. Hina's insecurities are exacerbated by her interactions with classmates and her own critical self-perception. However, her life takes a turn when she meets Kenta, a transfer student who sees beyond her physical appearance and appreciates her for her inner qualities. Kenta's encouragement and genuine friendship help Hina begin to question her negative self-image.

As the series progresses, Hina's relationships deepen, and she starts to realize that beauty is not solely defined by outward appearance. Through various experiences, including participating in a school festival, supporting friends through personal struggles, and confronting her own fears, Hina gradually gains confidence. The narrative also delves into the lives of secondary characters, such as Aya, who harbors her own insecurities, and Kenta, whose past experiences shape his perspective on life and relationships.

Themes of self-acceptance, the importance of inner beauty, and the impact of societal standards are woven throughout the story. Hina's growth is portrayed in a realistic and relatable manner, highlighting the challenges and triumphs of overcoming self-doubt. The series balances moments of introspection with lighthearted interactions, creating a narrative that resonates with viewers on both emotional and personal levels. By the end, Hina's journey serves as a testament to the transformative power of self-love and the value of genuine connections.