隠れオタクでごめんなさい (Kakure Otaku de Gomennasai)

Background
A humorous song by Katahotori-P, about an otaku girl and her discovery that the people around her are otakus too (she encounters a boy from class when cosplaying, her father visits maid cafes, and a video of her mother dancing in her school uniform has become a popular video on Niconico) while coming out of her shell.

This song is featured on the album ハイテン★ガール２ and has entered the Hall of Fame.