One day, a mysterious woman named Renge Misogi appears at his doorstep, claiming to be an NHK (Japan's public broadcasting organization) collector, tasked with collecting a subscription fee for the TV license. However, Tatsuhiro soon discovers that Renge is not who she seems to be.

Here's a brief summary:

Throughout the series, Tatsuhiro's character undergoes significant development as he slowly begins to open up and engage with the world outside his apartment. With Renge's help, he starts to face his fears and take small steps towards recovery.

A unique and interesting choice! "-Oyasumi- NHK ni Youkoso" or "Welcome to the NHK" is a Japanese manga and anime series written and illustrated by Hikaru Ohtake. The story revolves around the life of a young man named Tatsuhiro Sato, who finds himself struggling with social anxiety, depression, and hikikimori (a Japanese term for a person who withdraws from social life and isolates themselves at home).