Arisu, Yuri's twin younger sister, died.

Yuri was unable to accept that tragedy.

One day, she had a dream.

When she came to, Yuri found herself lying on a bed in a dark room.

"I'm home, Yuri-chan."

Yuri was overjoyed to be reunited with Arisu, who should have been dead.

However, there was something different about Arisu—she seemed more alluring and mysterious than usual.

Fearing that she might lose Arisu again, Yuri chose to spend a sweet honeymoon-like time with her.

Unaware that she was merely being toyed with in the palm of a wicked god's hand...