The Descent of the Evil God

A certain loser on Earth, doing good deeds, stumbled upon a book called 'Master of Slumber's Teachings'. After studying it, he encountered a divine and beautiful woman, who exchanged 'Master of Slumber's Teachings' for a drop of blood, thus becoming the lowest-tier vampire. Just as he was about to flaunt his skills to establish a harem of three thousand, he was interrupted by...