S1.E4 ∙ Nigete no garete, oneesama/Odoroite, akuryô

Yorito Morimiya meets Matsuri Shihou, an immortal ageless "Yaka". Their chance meeting unravels a story that stood still for hundreds of years.

The band-aid on Katta Kirifuda's forehead -- used to suppress his uncontrollable power -- has peeled off. There seems no adverse effect at first. Suddenly, Katta's pet hamster Hamkatsu starts talking, revealing a big secret.

The year 2050, Ban Yamano is an average middle schooler who loves LBXs, but couldn't have one due to his mother's banning after the death of his father 5 years ago. One day when he was returning home, he comes across a Rina Ishimori who hands him a metal briefcase saying it is the key to both "hope and despair" for all humanity. He returns home to discover the contents in the briefcase, an LBX model named "AX-00" never seen in the sales catalogs. Then he get ambushed by a mysterious LBX legion, leaving Ban no choice but to fight back using the AX-00. Ban manages to fend them off, but finds himself caught later in future battles for the sake of recapturing the AX-00. Together with his classmates, Ami Kawamura and Kazuya Aoshima; they fight off the enemies later confirmed as the Innovator. Led by Yoshimitsu Kaidou, this mysterious organization whose agendas for global domination involves the hidden key item inside the LBX model. Soon, Ban will come across many friends and rivals from his LBX battles to accompany him in the fight against the organization. Teaming up with Hanzou Gouda, Daiki Sendou, and the mysterious transfer student, Jin Kaidou; they join the anti-terrorist organization called the Seekers, led by Takuya Uzaki, younger brother of the CEO of the world's top LBX maker. As the fight against the Innovators continues, Ban would discover the true nature of the LBXs, including the reason for his father's disappearance.

The Weiss Kreuz OVAs technically come after the TV series. Kaori and Akira, sister and brother whose parents were murdered by the American military then said to have died in an accident, are trying to do themselves what Weiss is meant to do. Kaori, a teenage girl who attends the same school as Omi, hacks into the American database while her brother, Akira, goes in to kill the man responsible. Since he is trying to do this Weiss gets a mission to destroy him. Omi, being friends with Kaori, and Ken, thinking that Akira and Kaori are in the right, both refuse the mission. Aya and Yoji, however, accept. This leads to conflict within Weiss.

The anime centers around a boy named Kouta Kouka "Kouka Kouta in Japanese name order, an apparent wordplay on Coca-Cola". Kouta strives to be the world's best Bottle King at the Bottle Battles in the virtual Drink World. He comes across his Bottleman partner Colamaru and then wages battles with various rivals.

The series follows the adventure of Bearers of Light's Core that will shape the destiny of the world.