Fushigi no Maria-kun

"Ordinary high school girl, Nanami Tokuko’s childhood friend, Abe Maria, is the world’s last pureblood vampire!! For 10 years, Tokuko has been encouraging him to become a part of human society, and since then, Maria has come to love humans. As such, Tokuko happily watches over Maria. This couple's story is the world’s most gentle vampire comedy."