Hundred - S01

When an alien life form called "Savage" attacks humanity, the only weapon that can fight it is a technology known as "Hundred." Hayato Kisaragi, a survivor of a Savage attack, is a teenager with the highest compatibility level for that technology, so he is invited to hone his skills at Little Garden, a prestigious military academy on board a battleship. During his intense training for the coming battle, he quickly draws the interest of several female classmates and gets pulled into a number of incidents as he tries to fight the creatures that now inhabit Earth and threaten its safety.