Technologically advanced aliens (called Savages) invade Earth and an elite squad of young people, in a private air craft carrier - base city attend a special school to train their abilities and hardware (mecca type) called Hundreds. Within the humans that are able to use the hundreds there are about ten or so elites called variants (people that received the virus directly from the Savages) and are able to wield the Hundreds better with more of their capabilities and varied attack and defense styles. At first glance the Hundreds are like futuristic exoskeletons, weapons, defensive and attack systems. So in the beginning of the story, a young boy (Harato) and Emile (Emily) were escaping from a Savage, when the savage bites Emile, and Harato to try to save her from the poisoning sucks out the "poison" and faints and forgets everything. Later Harato is invited to become part of this hi-tech school of Hundreds, and he accepts because they have a super high-tech lab facility that can regain the health of his little sister Karen. So this light novel series is a school, with hi-tech mecca exoskeletons, in a kind of Harem ambiance for Haruto, with a kind of siscon/loli relationship with his little sister Karen. Of course, it was first published in 2007, so it older than most of the cliche school related mecca light novels that came after this one. It was made into an anime series with 12 episodes in 2016 and so far as I know, only this first volume was published in English. Although it has already 16 volumes in total.
Claire Harvey character is super disappointing and annoying also terrible. The story would be better without that lame arrogant, hypocrite girl there, abusing her title to get close to Hayato, she’s unprofessional at all!