Mahiru Shirota firmly believes that simple is best and troublesome things should be avoided at all costs. It is troublesome to do nothing and regret it later—and this ideology has led the 15-year-old to pick up a stray cat on his way home from school. As he affectionately names the feline Kuro, little does he know that this chance meeting will spark an extraordinary change in his everyday life.
One day, Mahiru returns home to find something quite strange: a mysterious young man he has never seen before. His subsequent panic results in the uninvited guest being exposed to sunlight and—much to Mahiru's shock—transforming into Kuro! Upon revealing himself as a mere lazy shut-in vampire, Kuro promises to leave once night falls. However, one disaster after another leads to Mahiru accidentally forming a contract with his new freeloader, dragging him into a life-threatening battle of supernatural servants and bloodthirsty beings that is anything but simple.
[Written by MAL Rewrite]+ More
More Seasons
Characters & Voice Actors

Kuro
Main
Arisuin, Mikuni
Supporting
Arisuin, Misono
Supporting
Belkia
Supporting
Doubt Doubt
Supporting
Doudou
Supporting
Guildenstern
Supporting
Higan
Supporting
Hugh the Dark Algernon III
SupportingRecommended for you
Heroman
TV
24m
Innocent Venus
TV
23m
Kodomo no Jikan (TV)
TV
24m
Lamune
TV
24m
Nande Koko ni Sensei ga!? Special
Special
12m
Black Lagoon Omake
Special
3m
Buzzer Beater 2nd Season
TV
25m
Arjuna
TV
26m
Domestic Girlfriend
TV
25m
Samurai Girls
TV
24m
Kobato.: Hajimete no Kobato.
Special
1m
Here is Greenwood
OVA
30m
Kure-nai OVA
OVA
29m
Girl Meets Girl
OVA
26m
Lupin III: The Columbus Files
Special
92m