NHK ni Youkoso!

Satou Tatsuhiro, a 22-year-old socially withdrawn loner, barricades himself in his apartment, subsiding on a meagre allowance sent by his parents, only venturing to the outside world to buy food under cover of darkness. One day, afraid he might miss the utility person, he opens the door to find a cute, mysterious girl, accompanying an elderly religious solicitor.

Through what seems to b...