The gang take a trip out to the country to go rafting. Akane decides that bigger is better, regarding both monsters and amount of fanservice.
Akane & Rikka go on a group date with some college boys, causing Yuta to get extremely creepy. Turns out Akane doesn’t like them that much, so she moves to the obvious next step – murder.
Akane creates a powerful new monster, which manages to defeat Gridman in battle. Sho and Rikka are forced to come to terms with the idea Yuta might be dead.
Yuta, Sho and Rikka discover that, although the school has been restored to good as new, the friends who were seemingly killed in the attack are still missing. They start looking into what’s happened but are soon confronted by the arrival of one of Gridman’s ‘friends’ and a fresh Kaiju attack.