The story is about a 16 year old boy who is granted the power of a defensive shield from an orb that falls from space. The orbs "attach" themselves to their host by entering their bodies. They are classified as Jet Orbs and Red Orbs. Jet Orbs are black, and the people who have these orbs created an organization that hunt down and defeat humans with the Red orbs. The reason for this is because the humans with Red orbs gain an intense thirst for bloodlust. The powers that people get from these orbs all differ, based on the host's memories and desires.
the main protagonist, wants to live a life in which he doesn't create memories with people because he feels that all memories lead to are pain. He wants to be completely sealed off from the world after a incident in his childhood where his family was murdered. Because of this desire when a Jet orb falls from space and enters his body he gains the power of an incredible force field that covers his body protecting him from almost anything. The downfall to this ability is Minoru cannot hear and nobody can hear him while is power is active (he's finally in solitude which was his desire).
The story goes on to follow Minoru as he discovers other people with Orbs and how his past memories are something that he can never escape. One thing I really enjoyed about this light novel and something that Reki Kawahara has never done before in his other novels is the fact that the story alternates between Minoru and Takaesu (the villian). It shows what Takaesu is doing behind the scenes and it tells us what his thoughts are throughout the fights and how to prepare himself to beat Minoru. Overall I really enjoyed this light novel as I read it in one day! I really hope Kawahara goes on to expand the the series!