Meet Sato Tatsuhіro, age 22. This person can tell you everything about loneliness, because he’s a hikikomori—a shut-in of the 21st century. He doesn’t study and he doesn’t work; his phone is always silent. He hasn’t spoken to anyone in several years. He sleeps sixteen hours a day and leaves the house only at night to buy food. One day, Sato realizes he has become a victim of a conspiracy by the ominous organization N.H.K. “Because of the taunts of those crafty N.H.K. agents, I became a hikikomori!” he decides. And then, someone knocks on his door—a lovely girl who offers him her help. Who is she—an angel-rescuer or an N.H.K. agent? What is N.H.K. really? And how can he return to a normal life? Sato will have to answer these and many other questions.