Story
Tatsuhiro Satou, a university dropout entering his fourth year of unemployment. He leads a reclusive life as a hikikomori, ultimately coming to the bizarre conclusion that this happened due to some sort of conspiracy. One day just when his life seems entirely unchanging, he meets Misaki Nakahara, a mysterious girl who claims to be able to cure Tatsuhiro of his hikikomori ways. She presents him with a contract basically outlining that once a day they would meet in the evening in a local park where Misaki would lecture to Tatsuhiro in an effort to rid him of his lifestyle.
Synopsis via AniList (English).
Preview
From the anime adaptation: Welcome to the N-H-K.