Kyuuketsuki Sugu Shinu

Vampire hunter Ronaldo storms the foreboding castle of the legendary True Ancestor, Draluc, determined to rescue a group of missing children from the clutches of an invincible monster. Instead of a terrifying beast, Ronaldo discovers a hilarious truth: Draluc is actually the weakest vampire in existence, constantly dying and turning into a pathetic pile of dust at the slightest fright or minor accident. With the "invincible" vampire proving to be a fragile roommate rather than a lethal threat, the duo forms an unlikely, chaotic partnership to handle supernatural threats and daily shenanigans.