Kokoro Hoshisaki

Kokoro is an inquisitive shut-in who's plagued by delusions of extraterrestrials, spurred by early-onset schizophrenia. Growing up with a single mom, he taught himself to read and they bonded of sci-fi movies and unsolved mysteries. When Kokoro's illness set in, he was consumed by paranoia and an inability to recognize those around him as anything but alien doppelgangers. Isolated and afraid, he retreated into stories of conspiracy and the paranormal to explain his delusions.

[From official site]