Hailing from the prestigious noble house of Delico, Dali Delico is an elite member of the Blood Pact Council with a promising future. When the Blood Pact Council, the highest governing body for the Vamps, assigns a special mission to Dali, he flatly refuses it. Having lost patience, Gerhard, Dino, and Henrique, who are also Council members serving the same term as Dali, rush to the house of Delico to persuade him. What they witness there is Dali, taking care of an infant himself… Meanwhile, there has been a series of mysterious murders targeting Vamps. And Dali seems to have a history with Pendulum, an antisocial organization that's thought to be the mastermind behind these murders… This is the record of the nobless oblige scramble of child-rearing by the noble Vamps. Can they find the right balance of their absolute mission and childcare in this magnificent gothic world?! 
(Source: Crunchyroll)
 
Note: 'Delico's Nursery' is a completely new work based on Kenichi Suemitsu's 'TRUMP' stage play and serves as a sequel to the 'Grand Guignol' 2017 stage play in the series.