The Isolator

The Isolator (絶対ナル孤独者) is a light novel series by Reki Kawahara, with illustrations by Shimeji. Its first volume was published in June 2014 under the Dengeki Bunko label. Yen Press has licensed it for English release.

A manga adaptation by Naoki Koshimizu began in August 2015. Yen Press has also licensed it for English release.

Plot
Ever since a traumatic childhood event, Minoru Utsugi has wished for one thing: solitude. Years later, a mysterious artifact from space embeds itself into Minoru's body and grants his wish. However, others have also have their greatest wishes fulfilled by these alien artifacts, but their wishes aren't quite as harmless. When a murderous force threatens the people Minoru holds dear, will his newfound abilities be enough to stand in its way? And can he even stay the same after everything that's happened?