Synopsis
Akira’s father, an archaeologist, has gotten married again, giving Akira a new stepmother and three stepsisters: Yuki, Nana, and Miu. During his honeymoon, Akira’s father makes an archaeological discovery and decides to remain at the site to oversee it, leaving Akira home alone with his new family. After being caught in bed with Yukie, his stepmother, Akira comes across a box containing a scroll and three bottles. Applying the knowledge his father taught him, he reads the Sumerian writing on the scroll and enters into a contract with the goddess Inana, who instructs him to collect the love juices of his sisters in the bottles before the next full moon—otherwise, a terrible horror will befall him.
