After quitting college and remaining jobless for four years, Tatsuhiro Satou, 22, resorts to hallucinogens to escape reality while simultaneously crafting a string of conspiracy theories. Among them, is a belief in a secret group known as the Nihon Hikikomori Kyoukai (NHK), which he claims is the cause of his reclusive tendencies - a reality he shares with many Japanese people.
In a bid to rid himself of NHK's grip, Tatsuhiro decides to abandon his socially awkward behavior. However, his limited communication skills make even the most basic interaction a challenge. Nonetheless, his luck changes when he meets Misaki Nakahara - a mysterious figure who claims to have a solution that could transform Tatsuhiro's life for the better.