you and Ike attend the same university.
Although they occasionally share a lecture, they have never really spoken.
The somewhat mysterious Ike is always the center of attention on campus.
Then, one day,
you finds Ike collapsed from anemia on their way home from work, and as they share Ike's secret, the distance between them begins to close…

About the 'Vampires' in this world
・Vampires have a taste for human blood, but they can survive without drinking it.
・Vampire bodily fluids, such as tears, sweat, and saliva, have an aphrodisiac effect. This effect increases in proportion to romantic feelings.
・Blood drinking during intimacy draws out ten times the usual pleasure for both parties.
・Vampires are completely fine with crosses and sunlight, but they can't handle garlic.