Bahamut is going on vacation to her beach villa with Jormungand as her personal porter. Syrop tags along for the food, while Leviatan wants to find the place in her dreams.

Kirino is being scouted by a model agent to work abroad, in a panic she gave the excuse of having a boyfriend for her reason of not wanting to leave Japan. She now needs Kyosuke help in order the keep the lie going but things start going too far…

After completing survival training, the NASA astronaut candidates are tasked to participate in the upcoming Comeback Competition. Each team receives an advisory engineer, but Mutta's team is stuck with someone who won't help.

Living underground in Giha Village, Simon and Kamina dream of a life on the surface. When their home is invaded from above, it is up to them to activate the mysterious mecha Lagann and save their village.

Kamina and Simon must work together to defeat a dangerous new Beastman threat.

Now that they've made it to the surface, Simon and Kamina must join together with Yoko and her village to defeat the Beastmen pursuing them.