I am Eirin Yagokoro, the doctor of Eientei, the household concealed by the bamboo forest of Gensokyo. Would you like to listen to my story, my darling? I am a billion years old, I used to be a sage of the moon, but after I made the elixir of immortality and gave it for the princess Kaguya to drink, we had to flee the moon, for it was a crime in the lunar capital to make an elixir of eternal life. Now, I live here on Earth, working as a doctor, and spending my free time with you, my husband.