Welcome to the N.H.K. (2006)

N.H.K ni yôkoso! (Welcome to the N.H.K) revolves around the life of Tatsuhiro Satou, a 22 year old hikikomori who hasn't got a job and feels that the world around him is all a "conspiracy" controlled by the "N.H.K". He comes across a girl called Misaki Nakahara who is willing to change Satou's condition from being a socially awkward introvert into a more confident person.