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
The Island of Siliang
ONA
20m
Redo of Healer
TV
24m
The Day I Became a God
TV
24m
Rent-A-Girlfriend 2nd Season
TV
24m
Over the Sky
Movie
95m
Kiniro Mosaic: Thank You!!
Movie
82m
Kud Wafter
OVA
50m
Don't Call Us A JUNK GAME!
ONA
3m
Kemono Jihen
TV
23m
Demon Slayer Movie: Mugen Train
Movie
117m
The Boy and the Heron
Movie
123m
Eureka Seven Hi-Evolution 3
Movie
116m
So I'm a Spider, So What?
TV
23m
The Vampire dies in no time
TV
24m