A high school student's life takes an unexpected turn when he meets an oni (demon) girl on a quest in the human world.
Hiiragi Yatsuse, a first-year high school student who struggles to make friends despite his efforts to please others. His life takes an unexpected turn when one summer day, he meets Tsumugi, an oni (demon) girl on a quest to find her mother in the human world. Snow mysteriously begins to fall... and their adventure begins.
"My Oni Girl" is a fantasy romance film that intertwines Japanese folklore with a contemporary love story. It follows the life of Hiroshi, a lonely and introverted office worker in Tokyo. His mundane existence takes a dramatic turn when he encounters Yuki, a mysterious girl who turns out to be an Oni, a mythical Japanese demon.
Hiroshi finds Yuki injured and unconscious in an alley. Despite her horns and other unusual features, he feels a connection and decides to help her, taking her to his apartment. As Yuki recovers, she reveals her true identity and explains that she fled her realm to escape a dark prophecy threatening her kind.
As they spend more time together, Hiroshi and Yuki develop a deep bond that blossoms into romance. Yuki introduces Hiroshi to the world of Onis, sharing fascinating tales and experiences. However, their peace is disrupted when other Onis locate Yuki, determined to bring her back to fulfill the prophecy.
A climactic battle ensues between Hiroshi, Yuki, and the Oni clan. With the help of ancient rituals and Hiroshi's knowledge of folklore, they manage to thwart the prophecy and defeat the Oni leaders. In the end, Yuki chooses to stay in the human world, opting for love over her destined fate. The film concludes with Hiroshi and Yuki looking forward to a future together, merging their worlds in harmony.
"My Oni Girl" explores themes of love, acceptance, and the breaking of stereotypes, highlighting the power of love to transcend appearances and societal norms.