"Hoshino, Close Your Eyes" is a psychological mystery manga that centers around Hoshino, a high school student who possesses a unique ability to see the "true nature" of people through their eyes. This ability, however, comes with a heavy burden, as it reveals the darkest and most hidden aspects of individuals, often exposing their lies, secrets, and malevolent intentions. Hoshino struggles with the emotional toll of this power, which isolates him from others and forces him to confront the unsettling truths about humanity.

The narrative unfolds as Hoshino becomes entangled in a series of mysterious events at his school, where students and faculty members begin to exhibit strange and dangerous behavior. These incidents are linked to a shadowy figure known only as "The Puppeteer," who manipulates people's darkest desires and fears, turning them into instruments of chaos. Hoshino's ability becomes both a curse and a tool as he attempts to uncover the identity of The Puppeteer and put an end to the escalating turmoil.

Key characters include Hoshino's childhood friend, Aoi, who serves as a grounding presence in his life, offering emotional support despite her own struggles. Another significant figure is Kaito, a classmate with a mysterious past who becomes an ally in Hoshino's quest. The story also explores the dynamics between Hoshino and his estranged family, particularly his older brother, whose own secrets play a pivotal role in the unfolding mystery.

As the plot progresses, Hoshino is forced to confront not only the external threats posed by The Puppeteer but also his own inner demons. The manga delves into themes of trust, morality, and the duality of human nature, presenting a complex web of relationships and motivations. The tension builds as Hoshino uncovers layers of deception, leading to a climactic confrontation that challenges his understanding of truth and justice. The series balances its psychological depth with moments of suspense and action, creating a compelling narrative that keeps readers engaged.