Blood — thicker, and far more intoxicating, than a kiss.

At a certain girls’ academy that prides itself on purity,
beneath the still night where all creation sleeps and even the moon holds its breath,
the Velvet Room calls out to you.
The girls known as “Users” crave victory with insatiable hunger,
crossing blades in ritual combat.
From their hands, a demonic power is born without end.
Its source — the pure blood of maidens.

The girls called “Gifts” blush in rapture,
baring their skin as they offer their untainted blood.
To live on as the tide that nourishes the Users —
that is the very meaning of their existence.