Fighting Express Vol 2: Otaku Fighter (2008)

Endo, a member of FIGHTING EXPRESS, is well known as the strongest member. However, he is usually just a groupie hanging around an idol, Fuka (acted by Aya Kiguchi)... Finding out there's a devilish group stalking her, he draws fully upon the strength of the Akiba-kei Otaku's "pure love action" in order to save her!