I, Otaku: Struggle in Akihabara(2001)

Souta-kun no Akihabara Funtouki

Meet closet “otaku” Sota, a seemingly normal high school student with a secret obsession for the dog-eared anime character Papico. During one fateful trip to Akihabara, Sota’s life takes an unexpected turn when the crazed owner of a collectibles shop forces Sota to come out in all his fanboy glory.

(Source: Seven Seas Entertainment)