This is a minor nitpick but in English it should be "its" as in, possessive, and not "it's," which is an abbreviation of "it is." For example, the dialogue on page 15 would be "See, even now, despite its bitterness, you want to drink my blood, don't you?"
Oh boy, time to find out if it's ending (as something very close to this was the finale of the oneshot) or if the nun is going to be roped into these shenanigans for the long haul.