Tama-senpai, Long Time No See - S1.E10

Kenji gets kidnapped again, this time by the former student council led by senior student Tama. The Game Creation Club and Ataru race to save him, but find themselves facing the Science Club's robot mascot with Shinsen ("Barfy") riding inside. Takao ends up defeating the robot by herself, but when they reach the classroom, Roka finds her usual "darkness" bag attack blocked by Tama's unique twintail hairstyle. Tama demands the Game Creation Club (Provisional) disband, and Kenji proposes a contest to save the club.