A j's manga / #Supernatural(127)

Angel used as military weapon finds his mate.

Tentacles in forest bring couple to consummate their relationship.

Vampire falls for childhood friend 15 years later bites his friend and his deadly family appears. Like the relationship with the father and uses writer friend too.

Black Butler ch 57-59 has Elizabeth sword fighting zombies to save Ciel, ch 60-61 shows when Ciel summoned Sebastian and formed the contract.

Parent remarries to rich vampire/siren family...