Two important childhood memories: one that mustn’t be forgotten, and one
he’ll never forget. These are the memories of Sousuke’s childhood
encounters with two important women in his life: the now-forgotten
vampire princess Silvia, and his always-close-by childhood friend
Yukari. Now, many years later, Silvia returns as promised to fulfill her
blood pact with Sousuke, but things didn’t go as planned. Not only does
Sousuke not remember her, but his blood has been “tainted” by another
vampire without him knowing it. To a vampire, the relationship with
their contracted partner is a lot like a “first love”, and it’s totally
forbidden and taboo for another vampire to “steal” someone under another
vampire’s pact. Unfortunately, the vampire responsible someone very
close to Sousuke doesn’t appear to be aware of what she did. Before
Sylvia can forcibly undo the improper blood pact to restore her own,
Sousuke’s father proposes a special arrangement: since the blood pact
depends on the mutual feelings of the contractor and contracted, within
the next lunar month whoever Sousuke comes to love most will keep their
contract. Not happy with the way things are going, Sousuke’s (adopted)
younger sister Mai declares suddenly that she’s entering the “game” as
well in order to protect her beloved older brother from these vampires.
Sousuke’s peaceful days are over.
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