Kaori, a 19-year-old plagued by crippling shyness, harbors an unspoken longing for an upperclassman known only as Senpai. Determined to confront her fears, she enrolls in "Secret Dreams," a virtual reality service promising tailored fantasies. The simulation initially immerses her in an idyllic, intimate encounter with Senpai—a fleeting echo of her suppressed desires.

A glitch warps the program, trapping her in a disorienting labyrinth where the simulation fractures unpredictably. The romantic illusion devolves into invasive, relentless interactions, stripping away her control. As the environment distorts further, she faces escalating psychological turmoil, her passive fantasies colliding with unnerving consequences she never sought.

Her background remains sparsely outlined, with family, occupation, and external relationships omitted entirely beyond her fixation on Senpai. The narrative fixates on her unraveling psyche within the simulation, contrasting her fragile aspirations against the virtual world’s merciless manipulation. The story isolates itself to this single OVA, avoiding expansion into broader backstory or character evolution beyond the simulation’s confines.