Welcome to the N-H-K (2006)

S1E17 Welcome to Happiness!

Tatsuhiro receives a call from Megumi, the class representative from high school, and they arrange to meet. During their conversation, he confesses that he’s a hikikomori, prompting her to introduce him to a successful senpai who claims he can help Tatsuhiro overcome his NEET lifestyle. However, when he attends the peculiar seminar, Tatsuhiro soon realizes he has stumbled into a pyramid scheme instead.