Aru Hi Totsuzen Message Window ga Hyoujisaretan desu kedo!?

Kazuya Hayakawa is an ordinary university student whose life takes a bizarre turn when he wakes up one morning to find a mysterious message window hovering directly in his field of vision. No matter where he looks or what he does, the strange interface remains permanently visible, seemingly attached to his very eyesight. There is no way to close it, minimize it, or ignore its constant presence as he attempts to go about his daily routine. The true trouble begins when specific lines of text start appearing within this persistent display. These cryptic messages are far from passive notifications; they actively disrupt his thoughts and throw him into a state of complete confusion. Whether guiding, misleading, or simply overwhelming him with unexpected information, the window exerts a strange influence over his actions and decisions. From that day forward, Hayakawa finds himself trapped in an exhausting daily ordeal. Instead of focusing on his studies and normal campus life, he is forced to navigate a reality where an unseen force constantly manipulates him through the ever-present text. What initially seems like a harmless visual glitch quickly evolves into an inescapable struggle for control over his own life.