Satsuki Yumizuka, Sion Eltnam Altasia and Leez are outcasts of society, living in the alley, hidden from society. Satsuki and Sion are both vampires and together with Riesbyfe, they have been living aimlessly after the events of Tatari. Sion decides to use her alchemy powers to construct decent living quarters for them, but something goes horribly...