The Anime Lad
Saya Otonashi is a high school student who cannot remember the previous year of her life. A man arrives with a katana and pulls her toward a threat hidden inside ordinary society. The enemies are blood-feeding Chiropterans that can disguise themselves as human. Her missing past has therefore acquired both a weapon and an investigation.
Super Eyepatch Fox
Live as a student with one blank year in your memory. Receive a katana from a stranger and encounter monsters that hide behind human forms. Saya is drawn into the private conflict between the Red Shield and the blood-feeding Chiropterans. Every new danger also presses on the unanswered question of her own past.
Gigguku
Saya begins with a missing year and no way to explain it. Then a man places a katana in her hands and human-looking monsters force the hidden danger into view. The Red Shield has already been fighting them in secret. Now her search for the truth carries horror and the constant fear that an ordinary face may conceal something ravenous.
Father's Basement
Amnesia is familiar mystery machinery, and the story makes no immediate promise to explain it quickly. The useful pressure comes from the Chiropterans. They feed on blood while hiding among humans in altered forms. When Saya receives a katana and enters the Red Shield’s private conflict, every answer about the war may also touch her missing year.