Tomioka Yuuji, a 32-year-old night-shift security guard at a mall, leads a solitary life, often lazing around and exercising on the rooftop due to his poor people skills. Despite the job fitting his reclusive nature, he yearns for companionship and connection. One fateful night, he wishes upon a shooting star for friendship, and soon discovers a cryptic note predicting his madness and death within a year. This eerie message marks the beginning of a transformative period in his isolated existence, with both positive and unsettling changes unfolding. As Yuuji navigates these newfound developments, an enigmatic figure from a nearby apartment observes his negligence at work. Who is this shadowy watcher, and what secrets lie behind the ominous note that now haunts Yuuji's every move?