Simon and Kamina were born and raised in a deep, underground village, hidden from the fabled surface. Kamina is a free-spirited loose cannon bent on making a name for himself, while Simon is a timid young boy with no real aspirations. One day while excavating the earth, Simon stumbles upon a mysterious object that turns out to be the ignition key to an ancient artifact of war, which the duo dubs Lagann. Using their new weapon, Simon and Kamina fend off a surprise attack from the surface with the help of Yoko Littner, a hot-blooded redhead wielding a massive gun who wanders the world above. In the aftermath of the battle, the sky is now in plain view, prompting Simon and Kamina to set off on a journey alongside Yoko to explore the wastelands of the surface. Soon, they join the fight against the Beastmen, humanoid creatures that terrorize the remnants of humanity in powerful robots called Gunmen. Although they face some challenges and setbacks, the trio bravely fights these new enemies alongside other survivors to reclaim the surface, while slowly unraveling a galaxy-sized mystery.

A special episode bundled with the Nintendo DS game based on the series. Envious of seeing how Simon keeps his Lagann clean and neat, Kamina asks the mysterious Chitori to clean up his Gurren for him, unaware of her true intentions. (Source: Wikipedia)

The National Tournament continues for Ryouma Echizen and the Seishun Academy Boys' Tennis Team as they face off against last year's semifinalist, Shitenhouji Middle School. As winners of the Kansai Regionals, Shitenhouji is one of the top contenders to win this year's tournament. What's more, each member of the Shitenhouji team has skills that are said to surpass their Seishun counterparts. Shitenhouji also has Kintarou Tooyama, another super rookie who rivals Ryouma in strength and technique. Seishun will have to push the limits of their abilities to stand a chance at defeating the Kansai champions in this East versus West matchup.

Specials set six months after the end of Tenpou Ibun Ayakashi Ayashi.