"Hira Hira Hihiru" is a visual novel set in a fictional Taishō Era. It tells the story of its two protagonists' struggle against Aerodema, a terrifying disease which brings the dead back to life.
The game primarily unfolds through a linear narrative, but players can shape the story's direction by making meaningful choices at key decision points. These choices range from dialogue options to actions that significantly impact the protagonists' relationships and the eventual outcomes.
The narrative structure is unique, as it alternates between the perspectives of the two main characters - Masamitsu, a doctor specializing in the game's central disease, and Takeo, a university student. This dual perspective allows players to experience the story from different vantage points, enriching the overall understanding of the game's themes and events.
The game's artwork and character designs are praised for their high quality and atmospheric presentation, creating a visually striking experience. Additionally, the fully voiced dialogue, performed by professional voice actors, further enhances the game's immersive qualities.
One of the game's standout features is its in-depth exploration of complex themes, such as mental illness, societal stigma, and the struggles faced by both patients and their caretakers. The narrative handles these topics with nuance and empathy, offering multiple perspectives and encouraging players to engage with the thematic elements.
While primarily text-based, the game does provide occasional opportunities for players to interact with the environment or characters. This includes examining objects, conversing with NPCs, and engaging in minimal exploration, adding an extra layer of interactivity to the visual novel experience.