Plagued by visions of a psychopath after a slaughter in a busy street in downtown Ikebukuro, Madoka must question her own sanity as to whether what she is seeing is actually happening.

From MangaHelpers:

28 July 2061 was an unlucky day for Raiji, in which he was falsely accused of being a groper on public transport. That evening, he joined his friends, Yuma and Osamu, to watch Halley's Comet. The come ... , the three of them will encounter…

A cryptic request received out of the blue: "Hey, Asuka... search for my body". This is the start of how Asuka and her friends end up searching for scattered body parts in the middle of the night.

If they don't find the ... d person? Why is Haruka asking…

From MangaHelpers:

High-schooler Nishino Aoi is a history nut who's in the archery class at his school. Due to his skill in archery, he sometimes thinks that he's more suited to the Sengoku period of Japan. If he lived ... Will Aoi and his friends be…