Linebarrels of Iron - Season 0 Episode 2 OVA 2

After saving the world, Kouichi and his friends take a break at their JUDA Corporation spa resort. Kouichi attempts confess his feelings toward Kizaki, however a group of Linebarrels begin to attack the headquarters before he gets a chance. The group of Linebarrels are later discovered to be clones of the original Linebarrel. Kouichi and Kizaki unable to activate the original Linebarrel, rendering him useless to fight back. Nonetheless, Linebarrel instinctively awakens once again, and the two annihilate the echoes.