With little interest in school life Hakuno Kishinami’s placid façade conceals thoughts and daydreams filled with hatred and death, feelings he cannot pinpoint the source of. That changes on the morning he visits a mysterious area of the school shrouded in rumors of suicide and waking nightmares, where he learns that this existence is nothing but a virtual world designed to trap potential Masters.
A philosophical dialog-heavy drama with occasional action scenes and small bits of slice of life-ish comic relief. It can be watched either as a stand alone story or as an alternate universe supplement to Fate/Stay Night.
More Information:
aniDB
Netflix
Wikipedia